The largest clock face in the United States is twice the size of Big Ben and infinitely more ad-sponsored.

Pittsburgh's literal underground railroad.

Once used to screen films for theater owners to rent, this historic building is now a start up hub.

These elevated trucks were put in place as a middle finger to The Man, but are now considered folk art.

Its vast collection of wondrous gadgets details the fascinating history of information technology.

A slightly surreal menagerie of structures that were lovingly spared from demolition and reconstructed in a field.

The remains of an attempt to carve a thriving metropolis from the forest, and once home to the first revolving door in North America.

Cliffs that hold fossils, including the earliest known reptile, dating back more than 300 million years.

While this is positively the smallest library in Canada, it aspires to be the smallest in the world.

A rustic house where intellectuals and investors tried to put an end to Cold War nuclear armament.

This sprawling collection hides many charms.

Run by a eugenics advocate, this aging institution conducted secret radiation experiments sponsored by Quaker Oats.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

This award-winning men's bathroom was just too beautiful to not allow women to see.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

Sid Vicious famously punched a hole in the wall of this iconic music venue.

Songwriter Leon Russell transformed this church into a recording studio used by many legendary musicians.

This abandoned, windowless concrete block is one of the strangest buildings in Tulsa.

Walk through a restaurant's refrigerator door to reach this hidden bar.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

Church featuring "high Victorian gothic" architecture.

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

An acoustic anomaly with a mysterious cause.