This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

Colorful boxes placed over the dead are left to rot and crumble.

This WWII-era military installation once held an entire city within its walls - now, its walls are falling down.

Wedged between two sets of row houses is an awkwardly located family graveyard.

The likeness of the Baltimore music icon was unveiled in time for the anniversary of his Senate hearings on music censorship.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

A faded sign from the 1920s remembers Baltimore's resistance toward banning alcohol.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

The land is home to swimming ponies and a legendary 18th-century treasure.

A local farm's collection of unusual structures from a now defunct storybook amusement park.

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

A tribute to Ponce de Leon's supposed quest for eternal youth.

After the Cuban Revolution, the famous rum company had to leave their swanky headquarters behind.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

A Civil War Museum with some notable medical antiques.

This old-fashioned carhop restaurant gave the world the waffle cone.

Scenic mount trashmore, Virginia Beach's most curious waterfront still has a couple of secrets.

This statue is dedicated to Grace Sherwood, the last person in Virginia to be convicted of being a witch.

The maritime museum that boasts the largest nautical library in the western hemisphere.

Affectionately known as "Lord Bot," this historic statue has a cult social media following and rightly claims to be “the most metal inhabitant of the Wren Yard.”

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.