The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Two stunning 17th-century libraries and a cabinet of curiosities.

A church of bones, decorated with 40,000 human skeletons.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

A former factory serves as a shrine to the industry that sustained Santorini for decades.

One of Europe's largest supercomputers is housed inside of a disused chapel.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

This hill nestled in the Scottish lowlands was a ritual site for over 4,000 years.

Sited in an Inner Mongolian desert are the remnants of an important trade stop along the Silk Road.

Water-themed sculptures guard this unusually square structure.

A magnificent menagerie of oddities, including taxidermy cryptids.

The ruins of an ancient mansion sits in front of and underneath a contemporary art gallery.

The painting on an aptly named street honors the 1980s slasher movie.

It houses a menagerie of wondrous taxidermy specimens from around the world, including the remains of a famous gorilla.

The rubbery beast is sculpted from recycled materials.

The final resting place of the man whose name has become synonymous with greatness.

Preserved portions of Athens's ancient defenses are on display in a subterranean parking garage.

A preserved portion of an ancient Athens barrier is displayed in a hotel basement.

At the right time of day, sunlight floods through the roof of this cave and illuminates the small pavilion hidden within.

This tiny train shuttles passengers to one of Northern Ireland's most spectacular sights.

An amazing collection of curiosities hidden in a small Welsh village.

An ancient Incan convent on Lake Titicaca's Island of the Moon.

Two ancient Buddhist temples crown this dramatic rocky pinnacle.