Caves don't always have to be dark and dingy. Case in point: The Marble Caves off of the Patagonian Andes. The swirling marble walls, formed by 6,000 years of crashing waves eroding the stone, are as vibrant and lovely as the surrounding azure water.
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.