__FLAGS__ The page provides a list of locations that need to be visited in order to obtain the Traveler Achievement. None of the DLC areas are required for the achievement; neither are most random encounters or any of the origin locations that you cannot return to.
In Ostagar
In Lothering
General
In Redcliffe
Kaitlyn's Home (both floors)
House (Scraping the Barrel quest for Blackstone Irregulars, located across the bridge)
In Lake Calenhad
In the Circle Tower
Circle Tower (every floor)
The Fade (every section)
In the Village of Haven
Haven Chantry (the one where you find Eirik)
Villager House (near entrance, to the left, as you enter the village - contains the Bloody Altar)
In the Frostback Mountain Pass
In Orzammar
Janar Armorers / Beraht's Shop
Carta Hideout / Beraht's Hideout
In the Deep Roads
In the Brecilian Forest
In Denerim
Abandoned Orphanage (to gain access talk to Ser Otto in the alienage to obtain the side quest Something Wicked)
Valendrian's Home (not required; if Valendrian dies and you thus can't enter his home, you still get the achievement. With sufficient lockpicking, you can break in to Valendrian's home)
Tevinter Warehouse (previously Compound)
K's Hideout (not needed for the achievement)
Fort Drakon (awarded once you reach the top floor and fight the archdemon)
Dark Alley (Back Alley Justice)
Deserted Building (The Last Request)
During side quests
Civil War- From the Chantry board in Denerim, "Loghain's Push" side quest.
Battlefield - From the Chantry board in Redcliffe, "Brothers and Sons" side quest.
Abandoned Meadow - "Refugees" on World Map. From the Chantry board in Redcliffe, "Desperate Haven" side quest.
Caravan - From the Chantry board in Redcliffe, "Caravan Down" side quest.