This famed marionette theater and museum is bursting with imaginative string puppets.

This tiny little cave was said to have been a refuge for a saint with a glowing arm.

These stairs were built to accommodate royals mounted on elephants.

On rare days, this abandoned castle's gatekeepers open its doors, revealing the eye-popping splendor hidden inside.

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

This Soviet-era athletic and recreation facility is the highest ice skating rink in the world.

These Pre-Columbian petroglyphs contain representations of birds, deer, hunters, and even some early Native flute players.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

One of the world's oldest trees comes with a Welsh legend intertwining it with a spirit prophesying death.

Two massive boulders, rocking back and forth with the ebbing of the sea.

A city built from mud and known as the "Manhattan of the desert."

Rumors and legends of secret Nazi activities surround this eerily remote island mansion.

This imposing memorial contains the remains of Che Guevara — and 29 other guerrillas who died with him in Bolivia.

Sky ships, planes, and portraits left as unique tokens of hope and thankfulness.

Europe's only museum solely dedicated to the history of whaling still has a fully-functioning whaling ship.

One Italian taxi driver covered his entire house in small seashells creating a weird bit of architecture that is preserved to this day.

This bone-filled cave got its name after they found 140 bear skeletons inside.

The location of the last witch trials of Italy, known as "The Salem of Europe."

Rent out a glass igloo to watch the Northern Lights like you live in the future.

The largest flower auction house in the world.

The first green space constructed on an elevated viaduct.

Religious perseverance and cultural coexistence manifest in an architectural gem that multiple wars couldn't topple.

This is not only one of the oldest collections in Europe, but also possibly the most beautiful.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.