Returns the terrain type for the given room. The terrain type affects how many movement points are required to move through that room, and in some cases which special powers are required to move through that room. Possible terrain types are:
| inside | city | field | forest | hills | mountain |
| water-swim | water-noswim | flying | underwater | desert | swamp |
| beach | garden | ice | cemetery | ocean | lake |
| river | underwater-open | ocean-floor | lake-bottom | underwater-cave | underwater-channel |
| cavern | dungeon | manmade-tunnel | sewer | mine | dwelling |
| bedroom | library | laboratory | temple | shop | office |
| kitchen | armory | tomb | forge | storage | bath |
| boat | riverbank | paddock | theater | dining | classroom |
| hallway | hollow-tree | rooftop | dock | ruins | underwater-ruins |
| dump | stairway | volcanic | void | moat | river-bottom |
| clouds | ice-cave | throne-room | charnel-house | tree-canopy | midair-windy |