The World Traveler trophy/achievement requires you to find all of the named locations in the game, and includes the Arctic Explorer, Urban Explorer, Highlands Explorer, and Blight Explorer trophies/achievements. This entire thing entails that you explore every nook and cranny in all of the locations in the non-DLC areas of the game, as well as making sure that there are no blacked out areas on your maps.

You will likely get a lot of locations while making your way through the main story and by doing all of the side missions, but there are a few that won’t be gotten by doing this. Remember that all of your discovered locations will carry over through subsequent playthroughs (TVHM and UVHM), but you’ll still need to activate the fast travel stations on those playthroughs.

Arctic Explorer has you discovering all named locations in Three Horns, Tundra Express, and Frostburn Canyon. Three Horns is divided into two areas, Divide and Valley.

Three Horns - Divide

• Fishguts Outpost

• Marrowfield

• Snowbound Crossroads

• The Drydocks

• Thirty Below
  Three Horns - Valley

• Bloodshot Slums

• Happy Pig Motel

• Shock Fossil Cavern

• Split Skull Bay

• The Frostsprings
  Tundra Express

• Buzzard Academy

• Meltwater Crossing

• Mount Molehill Mine

• Old Man Johnson’s Farm

• Ripoff Station

• Skittering Mound

• Tiny Tina’s Workshop

• Varkid Ranch

• Varkid Ranch Observatory
  Frostburn Canyon

• Ashmouth Camp

• Blacktoe Cavern

• Blisterpus Camp

• Firehawk Lair

• Frozen Ant Lake

• Incinerator Camp

Urban Explorer has you discovering the locations in the following areas: Sanctuary, Opportunity, and Lynchwood.

Sanctuary

Sanctuary is a fairly small place and you will likely stumble upon most of the areas just by exploring the town. Some of these places are important to progression, since you will most likely need them, like the Black Market.

• Black Market

• Crimson Raiders HQ

• Dr. Zed’s 24/7 Clinic

• Marcus Munitions

• Moxxi’s

• Pierce Station

• Scooter’s
  Opportunity

• Hyperion Office Complex

• Living Legend Plaza

• Opportunity Square

• Orbital Delivery Zone

• Residential Quarter

• The Pits

• Waterfront District
  Lynchwood

• Death Row Refinery

• Gunslinger’s Corner

• Main Street

• Old Mine

• The Grinders

Highlands Explorer will require you to find all of the named locations in the following areas: The Highlands - Outwash, The Highlands, Thousand Cuts, and Wildlife Exploitation Reserve.

The Highlands - Outwash

• Hyperion Extraction Plant

• Orbital Receiving and Processing
  The Highlands

• Aggregate Acquisition

• Blake Bridge

• Frothing Creek Mill

• Hunter’s Bane

• Isotope Reclamation Center

• Lake Shining Horizons

• Mercury Induction Station

• Old Cranky’s Pond

• Overlook

• Whispering Riverbed
  Thousand Cuts

• Bloody Knuckle Point

• Broke Face Bridge

• Buzzard Factory

• Central Core Loading Dock

• Central Core Supply Dock

• Competitor Deferrence Field

• No Man’s Land

• Slab Town
  Wildlife Exploitation Reserve

• Bloodwing’s Enclosure

• Casa de Mordecai

• Observation Wing

• Preserve Dockyard

• Specimen Maintenance

Blight Explorer requires you to find the named locations in the following areas: Eridium Blight, Arid Nexus and Sawtooth Cauldron.

Eridium Blight

• Bruiseboulder Quarry

• Eridium Extraction Plant

• Grandma’s House

• Human Dwelling Place

• Infused Grotto

• Lover’s Leap

• Mount Hellsfont

• Slag Scar

• Slagma Refinery

• Stagma Vapor Extraction
  Arid Nexus Boneyard

• Eridium Pump Station #1

• Eridium Pump Station #2

• Eridium Pump Station #3

• Hyperion Truth Network

• Loader Maintenance Depot

• Transmix Regulator Station
  Arid Nexus Badlands

• Fyrestone

• Hyperion Info Stockade

• T.K. Baha’s House
  Sawtooth Cauldron

• Avie’s Camp

• Cramfist’s Foundry

• Main Street Reservoir

• Sawtooth Stilts

• Scalding Remnants

• Smoking Guano Grotto

• The Buzzards Nest

All of the locations above count towards this trophy/achievement, but getting all of the above won’t guarantee that you will get this, as there are some more locations that you need to find. There are a number of areas that don’t have any named locations within them, which are Southpaw Steam and Power , Friendship Gulag , Sanctuary Hole , The Bunker , Control Core , Ore Chasm , and Vault of the Warrior . These locations are as follows:

Windshear Waste

• Claptrap’s Place

• Frostbite Crevasse
  Southern Shelf

• Bandit Freighter

• Gateway Harbor

• Liar’s Berg

• The Soaring Dragon

• Wreck of the Ice Sickle
  Southern Shelf Bay

• Blackburn Cove

• Ebonfloe

• Ice Flows
  The Dust

• Boot Hill

• Bug Gulch

• Ellie’s Garage

• Goose’s Roost

• Hodunk Speedway

• Moonshiner’s Shack

• Old Dahlwell Oasis
  Bloodshot Stronghold

• Rat’s Nest

• Satan’s Sinkhole
  Bloodshot Ramparts

• Shrine of the Gunbringer
  End of the Line

• Snowblind Defile

• Terminus Plateau

The Fridge

• Crystal Claw Pit

• Frigid Cleft

• Icemaw Grotto

• Stalker Hollow

• The Rakk Cave

• The Rat Maze
  Fink’s Slaughterhouse

• Fink’s Slaughter Factory
  The Holy Spirits

• Ale Wee Cavern
  Caustic Caverns

• Abandoned Mining Site

• Dahl Deep Core 06

• Guardian Ruins

• Infested Warehouse

• Nether Hive

• Oozing Discharge

• Rumbling Shore

• Varkid Ramparts
  Hero’s Pass

• Drift Mouth Access

• Emergency Supply Cache

• Guardian Slag Heap