The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

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

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

The ghosts of Britain's telecommunication past sit rusting away in a small village in England.

Reputedly based on the tomb of Jesus Christ, this crypt is the oldest surviving structure of any cathedral in England.

At 1,732 feet above sea level, this spectacularly isolated yet surprisingly bustling bar is the highest pub in Britain.

Astonishing rock formations dot the Brimham Moor landscape.

Although it appears ancient and mysterious, the quirky folly was actually built 200 years ago by an eccentric estate owner.

Harry Potter once visited this massive limestone cliff, which was carved by an ancient glacial river.

One of the oldest and certainly best preserved Cistercian abbeys still in existence.

America's greatest forgotten garden and the former stomping grounds of Son of Sam.

This derelict building used to house infirm Freemasons, their widows, and orphans.

One of the earliest bowling lanes in the U.S. doubled as a sewing school during a time when women had little job opportunity.

This tiny church near Sleepy Hollow contains Henri Matisse's last work, a rose window, and nine windows by Marc Chagall.

This last stalwart of the now-forgotten feminist restaurant movement has been serving food in an activist atmosphere since 1977.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

A quirky assortment of musical marvels from around the world.

Thousands of American timepieces on display in the former clock-making capital of the country.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

100 massive sculptures in the Hudson River Valley.

A famed data visualizer's personal sculpture garden is a landscape of modern and megalithic wonders.