Cavernous
Rolling hills, trees, and massive caverns
Cavernous 2
Rolling hills, pine trees, and cavern system
Cow Towers
Central connected tower system with low rushing areas or hallway-like chunks of blocks on the sides
Desert Caverns
Desert with large cavern systems.
Ice Caverns
Ice world with cavern system and central river.
Ice Islands
Three icy islands. Middle island has extremely rugged terrain. No caverns.
Pyramids
Central pyramid structures with initial protective walls for spawns.
Siberian Summer
Light forest with rolling hills.
Sniper Hill
A cross between Snowblind and Caves