The Underwater Waterfall of Mauritius Island: Mauritius Island is located in the Indian Ocean east of Madagascar. The waterfall is an optical illusion created by sand washed into patterns that make it appear as an underwater waterfall. I want to go here!
Giola Lagoon/Thassos-Greece The Giola is a beautiful natural lagoon, like a swimming pool carved into the rocks. The water is warmer than the sea, which makes it pleasant for swimming. The place is unknown and the access there is difficult.
30+ mysterious caves, a deep walk into the heart of the earth
The Isle of Skye is one of the best places to visit in Scotland. It has a great mix of stunning scenery and excellent food. Gurness Holm would be a great place to visit too, but it's not open to the public and Cassandra says sod off.