WOW I would love to see this - Austria's Green Lake in the Hochschwab Mountains is a hiking trail in the winter. The snow melts in early summer and creates a completely clear lake. The lake has a grassy bottom, complete with underwater trails, park benches, and bridges
Underwater River in Mexico (Cenote Angelita). Underneath the water of Cenote Angelita is another flowing body of water. The river is full of hydrogen sulfate, which is much heavier than normal salt water. When it sinks to the bottom, it forms a flow of its own.
This stunning 18-feet-tall, 60-ton underwater sculpture of Bahamian girl carrying the weight of the ocean in Nassau, Bahamas.