1. Fly Geyser, Nevada, USA
Ok, this geyser isn’t 100% natural, but it was formed by accident. In 1964 drilling for sources of geothermal energy caused minerals to rise up into the strange-but-true form you can still admire today.
2. Plitvicer Seen, Croatia
The 16 Plitvice Lakes in Croatia are arranged in steps, linked by waterfalls. You can explore them on walkways like in the photo, or by boat.
3. Zangye Danxia, China
The sandstone landforms of Zangye Danxia come in idiosyncratic and colourful formations, their layers revealing thousands upon millions of years of history and prehistory.
4. Pamukkale, Turkey
The surreal beauty of these mineral hot springs in Denizli Province in south-west Turkey draws so many tourists that access is now restricted in the hope that its natural wonder will be preserved for many more people to admire.