Art museum based around the collections accumulated over 58 years by one eccentric thrift store owner.

A mailbox that saved a nature reserve.

An abandoned village that doubled as "The Hunger Games"' post-apocalyptic wasteland is up for grabs.

This bridge is haunted by the ghost of a distraught mother.

This shifting North Carolina sand dune is an odd little desert surrounded by oceanic forest life.

This bright yellow relic is the final survivor of a short burst of seashell-shaped petrol pumps.

Andy Griffith's hometown has made itself up to look like the fictional town of Mayberry.

A cabin completely covered in coffee mugs, where visitors are welcome to leave one of their own—if they can find an empty nail.

This North Carolina museum is keeping the pinball craze alive, with a little Space Invaders on the side.

Bigfoot prints, Feejee mermaids, and haunted dolls on display in a tiny North Carolina town.

A sculptor's dream castle turned fantastical ruin.

Mysterious ancient boulder carved with petroglyphs in the mountains of Western North Carolina.

A piece of outsider public art accompanied by a strange urban legend.

The grand marble structure next to the White House is Andrew Carnegie's temple to Pan-American diplomacy.

Fonts are born and bred here at the oldest letterpress type foundry in the United States.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

This quirky curiosity shop takes its cues from the world's bazaars.

"X" marks the spot of an echo chamber in the middle of a plaza.

An American city stranded at the tip of a Canadian peninsula where strict adherence to the "49th parallel rule" became problematic.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

A double agent hid information for the Soviet Union beneath this bridge for more than 20 years.