Two New York rooftops are home to the largest rooftop soil farms in the world.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

This eerie abandoned building with a dark history is said to be one of the most haunted places in the Philippines.

This imposing 20th-century castle was abandoned before it was ever completed.

Italian director Pier Paolo Pasolini fell in love with this lonely 13th-century tower while making his most famous film.

The ruins of a medieval village that was abandoned after a 19th-century inferno.

Explore the atmospheric ruins of an abandoned convent in the dense forests of Mexico's first national park.

Dubbed "Wistom" by locals, this abandoned factory is an urban explorer's dream.

This abandoned convent keeps the tomb of a legendary beheaded princess.

The headquarters of a pioneering cast iron and cast aluminum cookware company is in ruins, but still standing.

Obscured within a ring of trees, this abandoned World War II relic hides on a German hillside.

One of the largest wooden constructions in Europe was meant to be a casino, but soon became an orphanage.

This small, hidden cove is home to abandoned boats.

This mysterious, medieval cathedral remains unbuilt but fiercely protected.

This former maximum-security prison is creepy, sobering, and supposedly haunted.

An abandoned Art Deco hotel nestled on the side of a wooded mountain.

The decaying remains of a once-luxurious Soviet spa town.

This nearly abandoned "company town" is a ghost of Puerto Rico's once-lucrative sugar industry.

An abandoned bell tower in the middle of nowhere is the last testimony of a forgotten medieval village.

An abandoned 17th-century baroque hunting lodge with a wonderfully strange architectural plan.

This spectacular bridge is part of an abandoned train line that once connected Mallorcan capital to the southeastern coast.

Built to be the ideal penitentiary, this abandoned panopticon saw several revolts and even a prisoners' coup.

Stare out over the lagoon and beyond from this 10th-century campanile on the island where the city of Venice began.

This enormous abandoned prison was once dubbed the "Bastille of Romania."