Segara Anak, crater lake on Mount Rinjani in Indonesia

Buley Rockholes, Litchfield NP, NT, Australia

Saar River, Germany

Appalachian Trail, Smoky Mountains, Tennessee

Lake Tahoe, Nevada.

Ngarchelong, Palau

Tunnel Beach, Dunedin, NZ.

Mostar, Bosnia and Herzegovina

Cave of three bridges

A small stream near Arrowtown, New Zealand

Vatnajökull, Iceland

Devils Tower - Devils Tower, Wyoming

Mysterious Mountains