This Orthodox Church's exterior is rather unorthodox.

A windswept necropolis carved into the rocks overlooks the "most Portuguese town in Portugal."

The oldest living organism in New York City. Maybe.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

A merchant court dedicated to the fictitious King Arthur is heavily adorned with bizarre Renaissance art.

This opulent 16th-century Maharaja’s palace is a unique mix of Hindu and Muslim designs.

Sacred Indian temple that’s all monkey business.

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

This erect, phallic geological spire wasn't always named so domestically.

Oddly shaped rock formation, misassociated with a nearby utopian community.

Built to ward off Napoleon's army, this city-sized abandoned Russian fort is now perfect for urban exploration.

This super-sized statue is the only public memorial to the deal that ended America's neutrality during World War II.

This 700-year-old structure is one of the most unique architectural and historic monuments in Gdańsk.

This ancient Irish religious site is covered in ancient carvings, many of which have barely aged.

This mysterious but iconic tapered tower appears in many Azeri fairytales and legends.

A dramatic sculpture high up in Yorkshire with vistas on an industrial scale.

A moving memorial to the fallen and missing from WWI trenches.

This stone gatehouse was once the entrance to a historic mountain resort, and it had a cameo in a cheesy cult horror movie.

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

What was once a trend-setting, phrase-coining icon of architectural splendor is now a rotting, forgotten hulk.

"A hideous albatross in the Hudson River Valley."

A once grand hotel is being retaken by the wilderness it once capitalized on.

For over 80 years, Mayan ruins stood proudly in a most unlikely location.

One man's swirling six-acre monument of stone.