Concentrated around the Dead Sea, these surprising canyons are filled with coursing water, fish, and even crabs.

On this wooded path, a stained-glass window creates a spellbinding forest cathedral.

Known as the "Valley of the Moon," this Jordanian wadi is one of the most amazing desertscapes on Earth.

A remote island settlement off the coast of Tanzania is a storied archaeological site with an ancient past.

Crossing this suspension bridge feels like walking through the sky, a fitting tribute to the head of the Apollo program.

The largest lake in the Faroe Islands seems to be held hundreds of feet above sea level thanks to an optical illusion.

An officers prison camp believed to be impregnable by the Germans saw over 30 successful escapes.

Climb a set of vertiginous stone steps to the top of this impressive ancient edifice.

This dizzying span over the ancient Algerian city was once the highest suspension bridge in the world.

Rare recess caves fill this unbelievably beautiful Ohio park.

A secret climbing tree hides along the side of a Costa Rican road.

An engineering wonder at Pillnitz Castle protects a precious 230-year-old flowering shrub.

The steel cable lets adventurers zoom between two mountain towns at speeds of up to 75 miles per hour.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

A magnificent, long-abandoned castle built in the wake of the reconquest of Spain.

A castle in the Scottish Highlands has been continuously inhabited since the 1300s.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

This Ukranian fortress is one of the best-preserved medieval castles in Europe.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

These fantastically named natural pools look like something out of a Scottish myth.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

The city of Palestrina was built around this magnificent terraced sanctuary dedicated to the pagan goddess Fortuna.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.