Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

While only two of the ancient buildings at this site are actually churches this was one of the earliest Irish pilgrimage sites ever.

A remarkably intact castle that once was the largest in Ireland.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

Not even a series of devastating fires could keep this odd castle in upstate New York from bouncing back.

100 year tradition of fist fights, marked by marble footsteps.

A dangling church built over a Colombian gorge.

This bridge is the first to be made entirely from iron, but designed like it was still made of wood.

This bridge is embedded with a giant steel dragon that breathes fire from its mouth.

An architectural marvel that spans the Arda River, and has stories of a haunted past.

A gravity-defying "devil's bridge" that has a surprising architectural feature for its stability.

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

This amazing pedestrian suspension bridge in the Swiss Alps would give Indiana Jones nightmares.

This highest bridge in the world spans such a great chasm that it had to be established using rockets.

This historic stone bridge has an entire neighborhood clinging to its sides.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

This short pedestrian span is also known as the "Fairy Walking Bridge" because it looks almost magical.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

Shipwrecks, ruins, and turtles are all that remain on this haunting Caribbean ghost island.

This Netherlands museum holds a gloriously mechanical collection of ornate musical automata.

This abandoned, turn-of-the-century astronomy hub is now the subject of more photographs than it ever took.

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

Possibly the oldest living thing in Europe, more likely a pagan survivor.