WorldWorks Games have released a fantasy terrain set for the Pathfinder system.
From their website:
This Pathfinder compatible terrain setting is ideal for ornamental garden locations of all shapes and sizes. From backyard, to royal grounds, to subterranean cavern of wonders! The Garden is completely TerrainlinX compatible and can be freely mixed and matched with all other TerrainlinX terrain settings. Build your garden complex to any required configuration or height, remove or add floors/walls on-the-fly and store everything flat when finished!