Every spring, locals see the shadowy figures of a ghost army of slain Greek soldiers descend upon this ruined fort.

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.

The second-longest continuous wall on the planet protects a hidden secret in the deserts of India.

This remote stretch of sand is a penguin lover's paradise.

A remarkably well preserved tower dating all the way back to the Iron Age.

The world's largest ecosystem of its kind is home to South America's only native species of bear.

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

One of the largest collections of wildlife art in the United States, built into the side of a cliff in rural Wyoming.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

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

Largest lake in Great Britain measured by surface area.

Overlooking a Scottish loch, this beautifully crumbling castle once inspired a poem by William Wordsworth.

Where the sleeping monsters of Scotland's oil industry are left to rust.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

The one-time stronghold of the noble Douglas family, now home to ghost sightings and nesting birds.

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

Once a menacing challenge for trailblazers, this trail is now the most scenic drive in Utah.

This English medieval castle is where King John died of dysentery.

Stunning wetlands ablaze with pink lotus flowers.

The last manually operated turntable ferry in the world.

The “City of Stairs” sits high in the Andes, above the world’s largest underground copper mine.

Once home to Komodo dragons, this island dreamscape has a rare combination of white, pink, and black sand beaches.