31. The Wave, Utah.
The Wave is located on the Utah-Arizona border, which is halfway between Page, Arizona and Kanab, UT in the Paria Canyon/Vermilion Cliffs Wilderness. It’s nothing like you have seen elsewhere. It’s a magnificent red sandstone formation that is accessible only with a pass that you have to purchase in advance through a lottery. Only 20 people foot traffic per day is allowed to preserve the present condition of the Wave. That means you have to compete with so many applicants before you can get a permit to pass it.
32. The Crystal Cave, Iceland.
The Crystal Cave was formed as a result of its glacier meeting the Icelandic coastline. It is also called the Breiðamerkurjökull Ice Cave and is located in Vatnajökull National Park.
33. The subway in Stockholm, Sweden.
Sometimes referred to as “the world’s longest art gallery”, the Stockholm subway system is 110 kilometers long. Artists filled the subways’ walls with arts that make one feel like passing through a huge story land while traversing it.
34. The Blue Dragon River, Portugal.
It is also known as Rio de Odeleite. It has a mystifying dark blue color and a curvy shape that looks like the form of a dragon, hence the name.
35. Hang Son Doong, Vietnam.
Hang Son Doong is the biggest cave passage in the world. It measures 200m high, 150m wide, and 5km long. It is so huge that it has its own river, jungle, as well as climate.
