This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Ruins and statues dot the landscape of this tiny island rich with royal history.

Centuries of human activity have forged an eerie landscape of ruins and craters on an exposed and windswept hilltop.

Ruins battered by centuries of war and disaster offer a wondrous glimpse of medieval Ireland.

An eerie, decaying ghost town destined to fade into the forest.

Deep in the countryside lie the remains of one of the grandest Roman dwellings in Britain.

A ruined Maya city that suffered a years-long case of mistaken identity.

This forgotten boat elevator was an engineering marvel in its heyday.

The bombed out remains of the old church were kept intact next to the new one, as a reminder of the futility of war.

This elaborate Hindu temple is located in a Chicago suburb, but looks like it was transported directly from India.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

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

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

This robust fence in front of a historic Georgetown home is likely made from hundreds of recycled Revolutionary War firearms.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

This tri-part waterfall is a little bit of fairytale beauty in the heart of Luxembourg's Little Switzerland.

This Luxembourg cave is covered in cryptic looking marks left by mining activity.

This 600-year-old home seems to defy physics.

A memorial for a young woman and her ghost, which are claimed to have caused countless deathly shipwrecks.