The spot where three Protestant clergymen were burned at the stake during the reign of "Bloody Mary."

An incredible mosaic-lined monument said to have held the remains of an ancient Roman empress.

This 6th-century church has the largest and best-preserved collection of Byzantine mosaics outside Constantinople.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

The 20-mile causeway that separates the Netherlands from the sea.

A set of 27 bamboo tubes creates an eerie soundscape that changes with the wind.

The largest 19th century panorama in the world still in-situ.

A 1:20 scale piece of the Netherlands commissioned by a queen lets visitors take a stroll as giants.

A miniature city, once ruled by the Queen of the Netherlands.

A UFO-shaped event building originally intended to be a science museum showcasing the future.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

Amsterdam's former hotspot for public executions and dissections.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

A beautifully eclectic mix of architectural styles.

Two stone columns flank the grand Venice square, but there were supposed to be three.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

This museum offers an actual time machine back through Colorado's past.