One of the most elaborate displays of Jellyfish is on display at the aquarium.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

A modern day curiosity cabinet.

This unlicensed collection of fast-food memorabilia sits on the site of the first ever McDonald's restaurant.

Tiki luxury on Nob Hill.

World-famous, Pink's still manages to keep its prized cult fetish status.

America's most famous piece of self-built architecture.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

World's largest collection of serial killer artwork and other macabre exhibits.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

In Spain, the ruins of a Roman military camp sit along a flooded section of a river.

A reproduction of the famous prehistoric cave paintings is hidden underground at the National Archaeological Museum.

Famed architect Antoni Gaudi built this generous thank you gift to a friendly host who housed him during a job.

This small and often-overlooked museum holds some of Spain's finest artistic treasures.

The former 1920s mansion of a prominent Catalan developer was used as the Soviet Embassy during the Spanish Civil War, and there is still a bunker below the garden.

A 16th-century Andalusian palace.

One of the last remnants of the city's Chinese nightclub scene is now a dive bar selling killer mai tais.

This is one of the last remaining theatres in Canada to feature an Art Moderne architectural style.