A 1,215-foot tunnel transports pedestrians beneath the River Thames.

The capitol city's oldest existing cemetery.

The California capital city once stood 10 feet lower than it does today.

An eccentric home stands out in an otherwise average neighborhood with mosaics, mini topiaries, and kinetic sculpture.

The World's First 24 Hour Coin-Operated Art Gallery!! Plastic, Styrofoam, and Elvis--If you can't get rid of it, you might as well worship it!!

Entering this curiosity shop is like stepping into a mad scientist's lab.

The magic's in the hole!

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

Medical and zoological curiosities for sale.

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

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

Eighty million natural history specimens call this gargantuan museum home.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.