Terrain represents the different land features and barriers inside expedition maps. Passable terrains deplete sanity to travel across: more difficult or treacherous terrain costs more sanity. Any travel has a start cost of 5 sanity plus the travel costs of each traveled tile. Hovering over terrain reveals its type, and potential routes display their costs when charting course.
Passable Terrain
| Terrain Tile | Travel Cost | |
|---|---|---|
 |
Beach | 1 |
 |
Plateau | 12 (only 4 when using Climbing Gear) |
 |
Shallow River | 1 |
| - | Giant Cavern Mushrooms | 9 |
 |
Cavern Jungle | 6 (4 when equipping a Machete) |
 |
Cavern Lake Shallow | 3 (1 when equipping a Rubberised Waders) |
 |
Lava Crust | 1 (Becomes lava after passage) |
 |
Cavern Floor | 1 (0 when equipping a Hiking Stick) |
| - | Swamp | 9 (6 when equipping a Rope) |
 |
Jungle Rockspire | 6 (4 when equipping a Machete) |
 |
Thick Jungle | 6 (4 when equipping a Machete) |
 |
Grass | 1 (0 when equipping a Hiking Stick) |
 |
Prehistoric Plains | 1 (0 when equipping a Hiking Stick) |
 |
Prehistoric Thick Jungle | 6 (4 when equipping a Machete) |
 |
Giant Mushrooms | 9 |
 |
Shallow Sulfur River | 1 (-5 Health unless you equip a Rubberised Waders) |
 |
Tar Bog | 3 (1 when equipping a Rope, covers your trek in tar) |
 |
Dry Stone Forest | 6 |
 |
Dry Rockspire | 1 (0 when equipping a Hiking Stick) |
 |
Drylands | 1 (0 when equipping a Hiking Stick) |
 |
Desert | 9 (5 when using Water) |
| - | Dimensional Fog | 15 (10 when equipping a Fog Goggles) |
Impassable Terrain
| Terrain Tile | Conditions | |
|---|---|---|
 |
Mountain | Can be blown up with dynamite |
 |
Sea | - |
 |
River | - |
 |
Cavern Lake | - |
 |
Lava | - |
 |
Cavern Stalagmite | - |
| - | Fumarole | - |
 |
Sulfur | - |
 |
Chasm | Can be the result of a shrine aftermath. |