Lhiandrow | Terraria Music - Alternate Underground @Shadow666x666 | Uploaded 8 years ago | Updated 1 hour ago
From Volume 3

Music that plays while underground.

Buy the soundtrack:
re-logic.bandcamp.com/album/terraria-soundtrack-volume-3-2
or
http://store.steampowered.com/app/409210

Background:
http://www.terrariaonline.com/threads/terraria-biome-desktop-backgrounds.94614