The hidden lair of an alchemist rediscovered in a 2002 flood.

Installed at a chaotic intersection, this gave London traffic cops a place to hang their heavy woolen coats.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Dr. Strangelove-esque tours reveal the inside a bunker once reserved for Stalin himself.

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

Hundreds of hidden passageways weave through the old quarters of Lyon.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

During the holidays, a vintage subway train whisks New Yorkers back in time.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

Ingenious bakery opens up the first Cupcake ATM at their flagship location in Beverly Hills.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

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

One man's ambition created this psychedelic log home.

The Bong-area park police have asked visitors to please, stop stealing the signs.

At 207 feet, one of the world's longest continuous escalators.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

The biggest pinball arcade in the world has over 600 pinball machines, and 300 arcade machines.

The final resting place of the great escape artist, where some still gather to wait for his escape from death.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

Couple's personal collection of pinball machines turned public pinball museum.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Julia Morgan's Moorish-Gothic labyrinth of fountains, trees, natural light and Oakland's notable dead.