This structure among the trees was the result of divine inspiration.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

One of the most well-preserved temples of ancient Egypt.

This 19th century mansion façade adorned with immigrant patriotism is a symbol of Louisville’s history.

This rustic old building is said to be the most photographed barn in America.

The "father of immunology" used this humble hut to offer the local people some of the world's first free vaccinations.

A whimsical cottage from the 1300s with a preserved Victorian-era post office inside.

This centuries-old canal known as the Cuckoo Dyke has a staircase of locks suitable for a giant.

A great example of the inventive canal bridges that were deliberately split down the middle.

Hidden amid the tropical forest in the Caribbean Sea are the decaying ruins of the Cocaine King's luxurious island party home.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

Where Mary Shelley’s "Frankenstein" and John William Polidori's "The Vampyre" were born.

The ruins of New Zealand's largest classical-style church.

When the public was consulted about a new piece of street art, they naturally asked for an enormous metal dragon.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

Keep a lookout for replicas of this wooden soldier hiding in plain sight all around town.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

These medieval monastery ruins are surprisingly overlooked by most tourists.

England's only square-dimension hill horse was built to celebrate Queen Victoria's coronation.

An abandoned 19th-century iron factory perched along the outskirts of an idyllic village.

A secret meeting in this small cottage changed the course of British history.

The remains of what was, not so long ago, the world's largest city.

This abandoned fort is said to be the most haunted place in India, so much so that entry is prohibited after sunset.

A once-stately trading fort is now a ruin slowly being consumed by the sea.