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

A desert settlement founded and later abandoned by Hawaiian members of the Church of Jesus Christ of Latter-day Saints in Utah's Skull Valley.

The beehive-like buildings of this abandoned resort reside near the border of Mauritania and Senegal.

Camels and crocodiles share the black waters of this stunning Saharan oasis.

Blue-green pools and smooth stones comprise one of Spain’s most idyllic hidden wonders.

The Roman city was the birthplace of various emperors and is home to one of the empire's most impressive architectural feats.

Devastated landscape used for hundreds of years by the Romans as their primary mining site.

Considered the birthplace of the Copper Age and Bronze Age, the river is tinted red from 5,000 years of mining.

The world's most elegant power lines.

This gaping hole in the middle of a remote mountain lake looks like a portal to another dimension.

A deer-headed statue that brings together a 12th-century legend and big wave surfing.

The ancient sauropod tracks found in this former quarry are some of the largest in the world.

In Portugal, a secluded stretch of untouched natural beauty hides at the bottom of a steep hill.

Perhaps the most spectacular grotto along the Algarve coastline.

This panoramic lift provides a futuristic ride up San Pedro Mountain.

Giant granite sculptures representing family on the northern coast of Spain.

This enchanting natural park is a magical example of a temperate rainforest in Europe.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

The overgrown remains of one of the premier auto-racing speedways in the Midwest—and also one of the most deadly.

For millennia, explorers were obsessed with discovering the source of the Nile—is this small mountain stream really the answer?

An elevator into the Baltic Sea.

Climb around the high waterfalls on series of iron ladders and bridges within the wildest gorge in the Slovak Paradise.

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

The massive white mound and accompanying water terraces are a striking geological oddity.