10. Door To Hell, Turkmenistan
Back in 1971 Soviet geologists tapped into a cavern filled with natural gas. The ground collapsed leaving a large hole 70 meters in diameter. To avoid poisonous gas discharge, it was decided that the best solution would be to burn it off. Geologists expected the fire to use all the fuel in a matter of days, however the gas is still burning today. Locals have dubbed the cavern “The Door of Hell”.
9. Cappadocia, Turkey
Lying in south central Turkey, the moonscaped region of Cappadocia, is most famous for unique geological features called fairy chimneys. The large, cone-like formations were created over time by erosion of the relatively soft volcanic ash around them. Past cultures have dug into them to create dwellings, castles and even entire underground cities.
8. Giant Crystal Cave, Mexico
Giant Crystal Cave … is a cave filled with crystals. Connected to a mine 300m below the surface of Naica in Mexico, it is home to some of the largest crystals ever found!
7. The Alcázar of Segovia, Spain
Rising out on a rocky crag in the old city of Segovia is this incredible castle. It has been used as a fortress, a palace, a prison and a military academy.
6. Zhangye Danxia Landform, China
Forming for over 6 million years, this Danxia geological structure was formed by the erosion of red sandstone. Its special geological structure, combined with long-term weathering, freeze-thaw peeling, and wind and water erosion gave rise to its appearance today.
5. Dean’s Blue Hole, Bahamas
Dean’s Blue Hole on the Bahamas’ Long Island is the world’s deepest known underwater cave and one of the most beautiful. Plunging to a depth of 202m it is a scuba divers dream.
4. Lake Retba, Senegal
Also know as Lac Rose (meaning Pink Lake),this unusual lake found in Senegal, northwest Africa. It is known for its pink waters caused by algae and its high salt content.
3. Huacachina, Peru
In the midst of one of the driest climates in the world is an oasis town, Huacachina. With just under 100 people living in this lush oasis, they make their living by hosting travellers to climb to the top of their sand dune and watch the incredible sunset, before sailing down the slopes on rented sandboards or dune buggies.
2. Ice Caves of Juneau, Alaska
Lying beneath a 12-mile long Glacier are these spectacular ice caves. How can places this otherworldly, yet beautiful exist?
1. Grand Prismatic Spring, USA
The vivid colours in this hot spring are also a result of pigmented bacteria. The bacteria produce colours ranging from green to red.
Have you been lucky enough to visit any of these incredible places? We would love to hear your experience.