Places thedoubtfulguests Wants to Go

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

Tucked in the back of this amazing antique store is an important piece of medical history.

A crumbling hospital from the 1850s on Roosevelt Island.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

The world’s first penitentiary, meant to be humane, drove men insane.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

An artsy hidden staircase leads to breathtaking views of San Francisco.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

A terrific purveyor of natural history objects and curios.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The very first subway station in New York City is beautiful, decked out in chandeliers, and ... abandoned?

The early data processor factory founded in Washington for the 1890 U.S. Census went on to become IBM.

The only diamond mine in the world where you can keep what you find.

This Buddhist temple is home to the graves of the Japanese national legends, the 47 Ronin.

Carved initials which are nearly 500 years old preserve the deposed Queen's presence at Hampton Court Palace.

The medieval home is still engraved with the symbol of the profession, an eye flanked by two axes.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

A New York garbage depot holds a secret collection of weird and wonderful refuse.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

Trinkets and toys lovingly handmade by maximum security prisoners.