Waterfalls
- Twin Falls (Idaho), a waterfall in Idaho, the namesake of the city Twin Falls, Idaho
- Twin Falls (Montana), a waterfall in Glacier National Park (U.S.)
- Twin Falls (South Carolina), a waterfall near Pickens, South Carolina
- Twin Falls (Washington), a waterfall near North Bend, Washington
- Twin Falls (British Columbia), several waterfalls in the province of BC
- Twin Falls (Labrador), a waterfall and hydroelectric generating station in Labrador, Canada
- Twin Falls, Australia, a waterfall in Kakadu National Park in Australia
- Twin Falls, Maui, Hawaii, a waterfall in Twin Falls Maui, Hawaii
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