The hidden entrance, Glenarm Castle / Northern Ireland
Looking across the side of the dam at Lake Vyrnwy, Wales
by [Maverick] on Flickr.Tranquil Evening in Glacier National Park, Montana, USA.
The Old Town of Lijiang, Yunnan / China
“Lussok Cave and Underground River, Apayao / Philippines .”
Terrace by the canal in Ghent, Belgium
Light of the Gods, Khajuraho / India