Ruby Falls is a 145-foot high underground waterfall located within Lookout Mountain, near Rock City and Chattanooga, Tennessee in the United States.
The cave which houses Ruby Falls was formed with the formation of Lookout Mountain. About 200 to 240 million years ago (in the Carboniferous period, at the end of the Paleozoic era) the eastern Tennessee area was covered with a shallow sea, the sediments of which eventually formed limestone rock. About 200 million years ago, this area...

Cappadocia Hotel literally carved into the Yunak Evleri mountain cliff. It includes 6 cave houses, a 19th century Greek mansion and 30 rooms dating back to the 5th and 6th century. Another reason to visit the luxurious Cappadocia Hotel is the opportunity to explore its elaborate underground cities, cavernous churches and incredible rock terrain...

The Hill of Crosses, Kryzių Kalnas, located 12 kilometers north of the small industrial city of Siauliai (pronounced shoo-lay) is the Lithuanian national pilgrimage center. Standing upon a small hill are many hundreds of thousands of crosses that represent Christian devotion and a memorial to Lithuanian national identity.
The city of Siauliai was founded in 1236 and occupied by Teutonic Knights during the 14th century. The tradition of placing crosses dates from this period and probably first arose as a symbol of Lithuanian defiance of foreign invaders. Since the medieval period, the Hill of Crosses has...