The Thur waterfalls are two cascades located on the river Thur approximately ten minutes walking from the village square of Unterwasser in the canton of St. Gallen, Switzerland, The water cascades down from steep rock faces, and on highest point drops from 23 metres (75 ft). The road along the waterfalls was developed in 1927 and includes three observation decks.

• List of waterfalls in Switzerland
• Appenzell Alps