The underground rivers at Xcaret in the Mayan Riviera in Mexico!
near Cassis, France
Starved Rock State Park, Illinois.
Rio Celeste, Costa Rica. Costa Rica has a few secrets and one of them is the Rio Celeste located in the northwestern part of the country. Rio Celeste is known for its magnificent light blue color water. The river is surrounded by stunning rainforest and the entire area is located in Tenorio Volcano National Park.
Rio Celeste, Costa Rica
Fingal's Cave is a sea cave on the uninhabited island of Staffa, in the Inner Hebrides of Scotland, part of a National Nature Reserve owned by the National Trust for Scotland. It is formed entirely from hexagonally jointed basalt columns, similar in structure to (and part of the same ancient lava flow as) the Giant's Causeway in Northern Ireland and those of nearby Ulva.
Fingal's Cave. Staffa, Scotland.
The Dark Gorge, Salzburg, Austria