Ruins of a 13th-century fortress perched above a breathtaking Mediterranean bay.

Natural rock water slides hidden in the remote forests of northern Idaho.

A nearly abandoned Jewish settlement perched atop a hill in the heart of Yemen.

This mysterious, medieval cathedral remains unbuilt but fiercely protected.

The farmhouse owned by the Danish author who wrote "Out of Africa" is now a museum honoring her legacy.

Nikola Tesla's former home contains an homage hidden from plain sight.

An enormous alien invades Woking, England, as an homage to the H.G. Wells classic 'The War of the Worlds.'

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.

The little church's beautifully frescoed ceiling has earned it the nickname “the Sistine Chapel of Madrid.”

Home to pygmy hunter-gatherers, hundreds of animal and bird species, and the strange okapi, or forest giraffe.

This belfry is all that remains of the town that was buried by a violent volcano eruption.

A huge enchanting public park just outside the ancient walls of Rome.

A paradisical gorge with rapids, waterfalls, and wildlife whose raw beauty is the stuff of CGI movies.

Legend has it fairies gathered at the site of this medieval castle.

The small first-floor apartment where the author wrote her Pulitzer Prize-winning book 'Gone with the Wind.'

One of the most detailed and historically accurate collections of Ugandan artifacts depicting Bahima tribal history, culture, and daily life.

This former royal palace with gorgeous gardens became the first museum in Morocco.

Uganda's smallest savannah park is home to over 350 species of birds and mammals.

The world's largest frame offers spectacular views of the city's past and present.

Nestled in Uganda's Semliki Valley Wildlife Reserve, is a one-of-a-kind safari lodge.

This charming, medieval walled village is Spain's first "book town."

These rustic holiday homes are made from discarded fishing boat hulls.

Climb atop one of the world's longest and heaviest trains for an unbelievable journey across the Sahara Desert.

Dine amidst exotic plants at this former royal greenhouse.