Grand Prismatic Spring
The largest hot spring in the United States, painted by microbes
Natural Wonders
Extraordinary geological formations, thermal features, and landscapes shaped by millions of years of natural processes.
Cave of Crystals (Naica)
A cave containing the largest natural crystals ever found
Salar de Uyuni
The world's largest salt flat, a natural mirror in Bolivia
Paricutin Volcano
The volcano that grew in a farmer's cornfield
Ha Long Bay
Nearly 2,000 limestone karst islands rising from emerald waters
Plitvice Lakes
16 terraced lakes connected by cascading waterfalls in Croatia
Cappadocia Fairy Chimneys
Surreal volcanic rock spires carved by wind and water
Socotra Island
The most alien-looking place on Earth
Chocolate Hills
Over 1,200 symmetrical grass-covered hills that turn brown in summer
Wave Rock
A 15-meter granite wave frozen in stone for 2.7 billion years
Door to Hell (Darvaza Gas Crater)
A burning gas crater in the Turkmen desert that has blazed since 1971
Perito Moreno Glacier
One of the few advancing glaciers left in the world
Blood Falls
A crimson waterfall pouring from a glacier in Antarctica
Great Blue Hole
A giant marine sinkhole visible from space off the coast of Belize
Fingal's Cave
A sea cave built from hexagonal basalt columns on a Scottish isle
Pamukkale Terraces
Cascading white travertine pools fed by thermal springs in Turkey