Cactus Island is an island with several cactus-shaped mountains, with the "spikes" being tombstones. These mountains were never fully explored, so it's unknown how one can climb these mountains. This is one of the first islands reached in the Grand Line.

Little Garden is an island on the second row of islands in the Grand Line. Due to the climate, Dinosaurs are still alive here.

Drum Island is a Winter Island, located on the Grand Line. This is a snow-covered island with a chain of drum-shaped mountains, and is where Tony Tony Chopper was born. Years before the present timeline, the Drum Kingdom had a kind ruler. However, his son Wapol, who inherited the throne, proved to be spoiled and selfish. Among other acts, he forced all of the doctors except for his personal ones to leave, forcing the people to beg him when they needed medical attention. When the Blackbeard Pirates attacked, he and his cabinet fled, only to be defeated by the Straw Hat Pirates when he returned. Currently, the island is ruled by the Sakura Kingdom, headed by Dalton.

Alabasta is a desert kingdom in the Grand Line.The events here earned Luffy a 100,000,000 Beli Bounty and Zoro a 60,000,000 Beli Bounty.

Jaya is a forest-covered island that was once much larger than it is now, due to over half of it being launched into the White-White Sea by Knock-Up Stream. The island was ruled by the Shandians four hundred years ago, who guarded the Poneglyph located in their city of gold, but they too were launched into the sky. In the present day, however, the island is mostly uninhabited other than a few towns. The island seems to be a major base for pirates.

Skypiea is a Sky Island above the Grand Line. God Eneru came here after destroying his home Sky Island.

Longring Longland is a chain of ten islands in a ring shape, with a path between the islands that surfaces once every year. The animals that live here are unique in that they are all longer than normal in some way, such as tall horse with a long neck.

Water 7 is a city known for it's Shipwrights. The Straw Hat crew stopped here to trade in their gold for Belly, as well as repair the Going Merry and restock. It is part of the route their log is on, heading there directly after Skypiea. Once, Water 7 had seven docks, each were large drydocks used for building ships. Each one was run by a different company. One day a student of Tom, named Iceburg united all 7 docks into one company, named Galley-La Company. Ever since the docks have worked as one, each taking orders and building ships as part of the same group, however Dock One is known for having the best shipwrights and building the best ships. Some of CP9 worked at Dock One attempting to get Pluton's Blueprints. Iceburg, as well as being the CEO of Galley-La Company, also is the beloved mayor of Water 7.

Enies Lobby (エニエスロビー, Eniesu Robī) known as The Judicial Island (司法の島, Shihō no Shima), is a government-controlled stronghold in the Grand Line. Enies Lobby is located on an island referred to as both an "afternoon island" (昼島, hiru-jima) and a "never-night island" (不夜島, fuya-jima). Enies Lobby leads to Impel Down and the Marine Headquarters directly. Because of this, there are many Government Agents stationed here, roughly 10,000 troops, a mix of those from both the World Government and the Marines. The island also has a courthouse, which makes it easy to transfer high-level criminals through Enies Lobby and directly into Impel Down, or to the Marine Headquarters. Due to recent events, the islands has been completely annihilated in ruin due to the effects of a Buster Call.

Sabaody Archipelago is an area close to the Red Line.[1] Though it is called an archipelago, it is actually a massive mangrove forest growing out from middle of the ocean with each tree of the forest serving as an "island" for which people live on.[2] Since it is just a forest and not an island like those found in the Grand Line, it has no magnetic pull for which to affect a Log Pose. Its name comes from the Portuguese word Sabão meaning soap, and corresponds to its unique environment wherein soap-like bubbles come out from trees.

Due to the place being in close proximity to the part of the Red Line bordering the first half of the Grand Line and the New World, it is a highly visited rest stop for all sorts travelers to prepare before entering the New World. Aside from its unique environment and it being a booming business hub, it is notable for the World Nobles who visit there and a thriving slave trade supported by them. One notable slave group there are the Flying Fish Riders whose headquarters are several kilometers from the area.

Story wise, the concept of Fishman Island was first mentioned in chapter 69, where Yosaku explains about Jimbei releasing Something terrible to East Blue. Arlong and Jimbei had came from Gyojin Island. Sanji then speculated that the island may be somewhere in the Grand Line, as he dreamed of meeting beautiful mermaids.

Fishman Karate is learned here, as revealed by Oda, in an SBS question.[1] In the same SBS, Oda also stated that Fishman Island is half-way across the Grand Line. This is meant in the most literal sense as Fishman Island is in fact directly underneath the Red Line.

Later after the Enies Lobby Raid, the Log Pose started to point down, Kokoro, who is a mermaid from Fishman Island, explains that it's an underwater island where Fishmen and merfolk live. There is a unique way of going down there.

Marine Headquarters, or Navy headquarters, is the top base of the Marines[1], and seems to be where the Admirals reside, along with many Vice-Admirals and lower officers when they aren't assigned to another base. The Marine HQ is one of the three great powers, alongside the Shichibukai and the Yonkou.

Marine HQ has been mentioned many times, but has yet to play a significant role in the story. It is situated to the north west of the Sabaody Archipelago, and lies directle below Mariejois beneath the Red Line. According to Vice-Admiral Momonga is the town of it's location called Marineford[2].

Vira is a location in One Piece. Although never seen, Nami reads in the newspaper that is was recently overthrown. Vira is a small country in comparison to somewhere like Arabasta.

Later in the Jaya arc this place was also mentioned in one of Norland Montblanc's journal entries. 400 hundred years ago it was described as a sunny town.

Raftel (also occasionally called Rough Tale) is the island at the end of the Grand Line which supposedly holds the treasure One Piece.

It is also said that upon reaching Raftel, if one has taken with them along their journey the passages of the Poneglyphs, then the Rio Poneglyph will finally be revealed. For this reason, Raftel is the final destination at least for Nico Robin.

Supposedly, only Gol D. Roger and his crew have reached the island.

Banaro Island (バナロ島, Banaro-tou) is a island that recently was ransacked by Blackbeard and his crew. He also fought Ace here.

First seen in chapter 434, it's very close to Water 7, but was not the part of the Sea Train route.

This island is known to have huge rocks face up in different directions called Banana Rock. There is a town that looks like a town you find in the old wild west.

Paladego or Baldigo (バルディゴ - barudigo) is a place in the Grand Line. Not much is known about it, other than a base belonging to the Revolutionaries is currently located there.

It was labeled as "Land of White Soil".

There is a castle located here where Dragon sets up his base. The landscape has tall rock pillars and the ground looks like if it's snow-covered. It's also very windy here.

n the anime Nanimonai Island is an uninhabited island just beyond Arabasta. Miss All-Sunday gave Luffy an Eternal Pose to this island to help the Straw Hats reach Arabasta, but Luffy destroyed the pose, refusing to let her choose their route. As confirmed during the Little Garden arc, this island is actually feces left by a giant goldfish, one of Usopp's lies becoming true. "Nanimonai" means "Nothing" in Japanese.

Holliday Island is an island located somewhere in the Grandline. This is where Mr. 3 and Miss Goldenweek took their day off when they're not on a mission. A hotel with a giant pool can be seen in this island. Many visitors comes to this island. One of the identified visitors is Samuraï Battsu

Elbaf (エルバフ, Erubafu) is the name of an island inhabited by giants. Interestingly, it is "fable" spelled backwards, leading some fans to believe that there are more than just giants on Elbaf. Being inhabited by giants also suggests that Elbaf must be a really big island like Arabasta.

Yuki's Island is an island in which Yuki lived 100 years ago. It is located in Grandline. The Giant Pirates used this island as their hangout. It was at this place that Yuki asked Dorry and Brogy which one of them killed the biggest beast.

The Holy Land of Mariejois (聖地マリージョア, Seichi Marījoa) is the capital of the World Government and serves as another gateway to the Grand Line. The Government's HQ is there and the Council of Kings meets here.

Shanks' Jungle Island is an island located somewhere in the Grand Line. This is where Shanks and his crew rested for a while. Mihawk also visited there to tell Shanks about Luffy's first bounty. After hearing this news, Shanks, Mihawk and the rest of the crew start a party to celebrate Luffy's exploits.

Buggy's Treasure Island is an island located somewhere in the Grandline. Buggy and his crew were trying to find Captain John's treasure presumably located in this island. They didn't find it and they were made to work up a sweat by the Digger of Buggy's Treasure Island. The island's mountain has the shape of a skull.

Marine Base G-2 is a Marine stronghold shown during Ace's Mini Arc. Ace snuck in to find an intelligence report on Blackbeard.

St. Poplar is a town connected to Water 7 and Enies Lobby by the Sea Train tracks. It is notable as being one hour by Puffing Tom between Water 7 and this island. It's nickname is the "Town of the Spring Queen".

After the fall of Enies Lobby, Cipher Pol 9 were forced to come to this town and raise money to get medical treatment for Rob Lucci due to the damages taken in his fight against Luffy. They were forced to leave, though, after going too wild crushing the Candy Pirates.

Pucci is one of the cities conected to Water 7 by the sea train. It's mayor is Bimine. His daughter Marmieta and her manservant Yamenahare dwell there as well.

San Faldo is one of the cities conected to Water 7 via the Sea Train . Not much else is known about it.