The only surviving sidewalk clock in Brooklyn.

Historic Greenpoint theater turned roller disco, then chain pharmacy, and now Sweetgreen.

Once the smallest park in the national system.

Fall through a crack in the seams of reality at this immersive art installation.

Hidden within a spa in a Texas strip mall is a restaurant specializing in Eastern European foods.

A drawbridge named for a potentially intersex Polish national who fought alongside George Washington during the American Revolution, and an example of "Pulaski Red".

Michael Jackson got Bad and Crocodile Dundee walked on heads in this iconic Brooklyn subway station.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

How a century-old glass factory in Queens became a concert venue and arts center.

A B.Y.O.B. Mexican cantina lives inside one of the last tortilla factories in Brooklyn.

Padre Delgado, a leader in the fight for Salvadoran independence, is buried in this stunning Brutalist cathedral.

Construction of this bridge was once described as an "act of violence" against a neighboring country.

The remnants of the fortress that saved Georgia from the Spanish still stand guard on their swampy island.

This replica of a 16th-century French settlement memorializes one of the earliest attempts at a European settlement in North America.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

A collection of historical engines and rolling stock from throughout Riga's rich railway history.

A gallery of underwater art that can be visited by man and fish alike.

Rare signs of the former Soviet Union in the Caribbean, though not where you'd expect them.

A monument to the two U.S. officers killed by North Korean troops while trying to trim a poplar tree.

The site of many tense prisoner exchanges across the Military Demarcation Line between North and South Korea.

Secret North Korean passage discovered below the world's most dangerous border.

The best place for scenic views of the DMZ and North Korea.

South Korea's largely symbolic, barely used gateway to the North.

An oddities shop that dabbles in the deathly and beautiful.