You must take the A train... to the last active cemetery in Manhattan.

What was once a vast naval cemetery is now home to nesting birds and pollinating bees.

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

A treasure trove of rare and exquisitely detailed antiques

The "Seinfeld" diner.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

A student driver's nightmare.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

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

The world's only official college program focused on "clown therapy."

Hidden beneath a washing machine in a fake kibbutz, this secret bullet factory has been preserved as a museum.

Hidden out of public view in the National Library of Israel is a collection of "Stalag's," 1960s Nazi themed porno paperbacks written and consumed by Israelis.

You can row a boat through this ancient underground reservoir.

An otherworldly musical haven in The Big Easy.

Legend says a primate-like cryptid prowls this otherworldy sliver of the Louisiana bayou.

A pink cottage covered in hearts served as a haven and a resting place for LGBTQ activists.

Once defending the city of New Orleans from invasion by sea, this fort faces an uncertain future.

The only rotating bar in New Orleans has been slowly spinning since 1949.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

The most unloved grain elevator in Brooklyn was a “Magnificent Mistake.”

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

This abandoned subway station can still be seen on regular commuter trips.