Morocco's Argania trees are infested with nut-hungry goats.

Rocky Atlantic beach home to a stunning stone arch.

Founded as a refugee camp, now a popular tourist spot.

One of the tallest waterfalls in Africa is also home to a population of monkeys who enjoy the waters and the occasional guest.

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

Five ancient libraries, little changed for centuries, preserve a medieval archive of Quranic lore and civic documents

This functioning parish church is also the site of many concert performances due to its wonderful acoustics.

This abandoned mining village was predicted to resist decay longer than any other modern human settlement.

In the northernmost city in the world, it's illegal to be buried because it’s too cold for bodies to decompose.

The first tunnel to be dug beneath a river, repurposed as an art and museum space.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Home to three historic ships from the age of Vikings.

A serpentine highway twists and turns over the treacherous Norwegian Sea.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

The only quarter of the Old City not dedicated to a major world religion.

Oldest Protestant church in the Middle East, designed to resemble a synagogue.

The maze-like transportation hub contains abandoned areas, derelict stores, and a resident bat colony.

A 125-meter long "tribute to the Brazilian people."

This stunning Brazilian library contains the largest collection of Portuguese texts outside of Portugal itself.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

The largest catacomb system in the world.

This derelict superstructure was a very important warning system for the Soviet military.

This attraction was abandoned after the Chernobyl disaster.