This North African stone complex is considered to be the oldest astronomical observatory on Earth.

Home to an apple tree that can produce 25 different varieties of fruit.

A monument dedicated to the civil uprisings that took place during the Pots and Pans Revolution.

In Florida, these naughty monkeys live on their own mini-monkey Alcatraz.

Experience park where visitors are told to expect the unexpected.

The largest model carrot in the world.

Sleep in a glass pod dangling off a cliff.

These precariously placed ruins harken back to a 13th-century castle.

The unique building practices of the Batammariba reflect the community's deep reverence for and connection to the earth.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Climb to the top of this spiritual tower, and you'll be rewarded with spectacular views.

This tower was once used to create ammunition for early settlers.

Thousands of bottles that have held everything from poison to perfume make up the collection of this small museum.

A water reservoir disguised as a castle stands atop a hill in a park in Stockholm city.

This massive geographical sculpture is so subtle, it's possible to pass by it without noticing.

It's where the final scene of the beloved Tom Hanks movie was filmed.

Running since 1864, this clock has yet to be wound, one of the longest-running science experiments known.

A bridge that dates back to the 12th century is said to have made the devil very angry.

A historic observatory precariously perched at the "Top of Europe."

You can cross from one country to another in a single hop on this little bridge.

Apparently, the whole cosmos emanates from this plain concrete tower.

A small alleyway with an unusual moniker.

This shrine is an ode to the region's rich Hispanic heritage.

Two massive and unstable sinkholes are yearning to unite, and their consummation could be catastrophic.