"We gonna rock down to Electric Avenue, and then we'll take it higher..."

The lab where the scientist made his groundbreaking discoveries is preserved on the basement floor of the Faraday Museum.

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

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

An odd museum dedicated to French fakes.

A medieval military street hidden beneath a charming French fishing village.

Sip a cappuccino in the historic cafe that introduced them to the United States.

Generations have refused to move this doll from its dusty resting place to preserve a castle from a watery fate.

The two locations of this landmark ice cream shop scream pure Americana nostalgia.

Peek into a cave of giant, glimmering crystals.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

The "largest bathroom stall in the world" offers a unique pit-stop experience.

Village situated on a narrow volcanic escarpment.

After funding was cut for a memorial to the Danish author, the sculptor had his statue ceremonially lowered into the city harbor.

A relic of Victorian grandeur hides beneath a busy South London road.

This unassuming tree stump reportedly traces its roots to the famous pharaoh queen's reign.

One of the city’s oldest watering holes was originally the home of a famous James Brown (not that one).

A discreet little stairway on St. Nicholas Avenue leads to a quaint and unexpected cobblestone street of 19th century wooden rowhouses.

Wine bottle sculpture with a ship's stateroom inside.

Hiroshima survivor on Riverside Drive.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.