Ice cave in the Skaftafell National Park in Iceland. Ice caves collapse and new ones form as each glacier grinds slowly towards the sea. Local guides can help you (without dying) find one. (Visit Skaftafell National Park in Iceland.
Jason de Caires Taylor& underwater sculpture garden in Cancun. "Constructed out of concrete and steel, and bolted to the ocean substrate, the works here act as artificial reefs that provide & ideal habitat for filter feeding organisms.
This beautiful train track is naturally covered by green trees and makes a tunnel. Located in Kleven, Ukraine, this train tunnel is named as. “Tunnel of Love” by local people. These incredible photos were taken by Oleg Gordienko.