A deadly ancient portal to the underworld.

The ancient latrines of the Greeks, in all their public glory.

The alleged house of the Virgin Mary is tucked away in a park and nature preserve on Mt. Koressos in Turkey and is holy to both Catholics and Muslims alike.

This famous city eluded concrete detection until the early 2000's.

Fantastic lake on the heart of a fault line.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Roman ruins, natural methane fires and a lovely beach.

The bears of Bern have been a city highlight for over 500 years.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

A daily pyrotechnic celebration marks a beloved tradition during Valencia's festival season.

The world's largest solar furnace uses 10,000 mirrors to concentrate the sun's rays to generate power.

Stunning Roman aqueduct used for 1900 years and still standing.

Super Robot anime statue guards a forgotten suburban development in Tarragona.

Living towers made of people that are now recognized by UNESCO.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

Mountain where Jesus was first tempted by the Devil.

Catalonia Tradition: Beating the hollow Christmas log until it defecates in your fireplace.

A fantastic Christmas tradition where defecation meets the manger.