Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

Elevated freight railway turned wildly successful urban park.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Despite its name, this fast food museum is actually a replica of the ninth McDonald's store.

The lowest point in the state of Illinois, at the confluence of the Mississippi and Ohio rivers.

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

A miniature train-ride through Slovenia's largest cave system.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

This one-time health resort was used by aristocrats around the world.

Creaky dinosaurs grow in the backroads of Monmouth County, New Jersey.

Once the world's largest reinforced concrete structure, this abandoned bridge now beckons urban explorers.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

The highest point in New Jersey is marked by a massive, if simply named, obelisk.

Rusting away on the edge of New Jersey are the remains of a Cold War missile launch site.

A playground inspired by differential calculus dangles from the ceiling of the Liberty Science Center.

Local lore claims this park is named after a young woman who jumped off a cliff.

Historic town settled in the 19th century because of its convenient location along a popular coal transport route.

Tucked behind New Jersey's abandoned Gingerbread Castle lie the eerie ruins of a once-flourishing paper mill.

Several times a year, during low tide, two pairs of historic train tracks are revealed on this New Jersey beach.

This ominously named New Jersey street seems to be attracting over-the-top legends of its own making.

The rusting remains are visible sticking out of the waters of the Delaware Bay.

This Boy Scout retreat acted as "Friday the 13th"'s original Camp Crystal Lake.