This beautiful Miami garden was designed as a laboratory for tropical plants.

A perfect circle of twenty-four mysterious holes dates back to prehistoric time.

An abandoned water sports stadium that has become a haven for graffiti and decay.

An underwater city for the dead.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

A stunning medieval castle houses this eclectic, interactive tribute to all things wine.

This small but lovely sinkhole lake is the last remnant of a great prehistoric water basin.

One of the highest mountain passes in Europe has been ranked among the best driving roads in the world.

The sunlight passing through the opening of this huge cave system creates a magical effect.

The abandoned ruins of a failed resort hide on this verdant, picture-perfect island.

The bright red cars take travelers through breathtaking Tuscan scenery.

Nestled in the hills of Tuscany are gorgeous, multicolored hot springs.

The titular "little arch" near this Italian resort is one of the most popular diving spots in the country.

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

A sudden, striking cluster of hills south of Padua has been attracting visitors for centuries.

A climbing route in the mountains of Italy’s Dolomites, built for soldiers during World War I.

Windblown rock formations in an ancient Roman quarry.

Centuries ago, red and white wine poured from the statue's breasts whenever a new Venetian ruler was elected.

The walls and streets of the ancient city are peppered with penises.

Explore the quarry where the marble was sourced for Michaelangelo's David.

Sleep amongst an abundance of art from the modern era.

A spiritual sanctuary in a natural cave.

The oldest botanical garden in the world that technically isn't the oldest.

The first botanical garden, a feather in the cap of the Grand Duke of Tuscany.