Senegal's Lake Retba, or as the French refer to it Lac Rose: harmless halophilic bacteria make the water pink. Lake Retba has a high salt content, much like that of the Dead Sea, allowing people to float effortlessly in the massive pink water.
The Neversink Pit Sinkhole in Alabama. The Neversink Pit Sinkhole is located near Scotsboro, Alabama. It is a natural limestone cavity leading to a cave network. The hole is 40 feet wide at its opening.
Kaieteur Falls - the world's largest drop waterfall. Located on the Potaro River in central Guyana, Potaro-Siparuni region in Kaieteur National Park. My grandad was from Guyana, would love to visit one day.