This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

A long spiraling walkway winds through the woods, and around a copper beech tree at the center.

This high-design church is made up of two dizzying spirals meant to evoke the weaving together of marriage.

A lavish 16th-century mansion filled with spectacular staircases, fantastic frescoes, and gorgeous gardens.

This secluded ruin was once a home for exotic plants.

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.

An engineering wonder at Pillnitz Castle protects a precious 230-year-old flowering shrub.

Nestled between a college and a golf course, the garden is home to more than 2,500 rhododendrons.

This local landmark is home to art galleries and the area's only community darkroom.

This centuries-old mine remained hidden beneath a hotel bar until 2013.

This "cursed house" features secret rooms, hidden vaults, and dark escape tunnels.

Explore 10 acres of environmental sculptures.

A modern zoetrope on the New York City subway.

This innocent-looking townhome is actually a subway exit.

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

This abandoned subway station can still be seen on regular commuter trips.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

An unassuming secret door once led to a legendary watering hole.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

During the holidays, a vintage subway train whisks New Yorkers back in time.

An engineering error ensured this cavernous 350-foot-long subterranean thoroughfare was never used as intended.

Many of the murals covering this sleepy Florida town hide some sort of intentional error.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

On the outskirts of a desert trading village high on the Andean plain, steel giants have been destroyed by salt winds.