Rebuilt remains of a temple to Roman god Mithras.

This inexpensive lodging house was once a prison notorious for its inhumane practices.

Only hotel where you can legally launder money.

Seat of the Duke and Duchess of Devonshire for centuries.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

The oldest lawn bowling club in the United States.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

A monument celebrating the idea of reaching inaccessible places.

2300-year-old Roman road connecting the empire.

Nuclear reactor created the plutonium used on Nagasaki.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

The longest continuous lava tube in Oregon.

The celebrated eyesore created by starry-eyed sweethearts.

Over 315,000 preserved amphibians and reptiles in jars.

The culprit who accidentally lit this 3,500-year-old tree on fire stated "I can't believe I burned down a tree older than Jesus."

One of Canada's oldest museums, the beautiful Redpath has been serving up Natural History and Ethnography since 1882.

A historic presidential getaway on the continental United States' southernmost island.

A man-made island in scenic San Francisco Bay.

The taxidermied remains of a once-great parrot.

Scattered throughout London are ancient remnants of the city's former bounding wall.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

Louise Bourgeois' 30-foot-tall steel spider sculpture.