The oldest (maybe) swimming pool in Iceland is a stunning oasis built into the side of a lush hill.

A sulfuric martian landscape that looks far better than it smells.

An Italian hillside ghost town.

Henry Ford's failed rubber plantation in the middle of the Amazon rain forest.

A faux desert landscape in the middle of the jungle that sprouts oases during the rainy season.

A marvel of technology a century ago, this disused power station now offers a lovely glimpse into the industrial design of the past.

A two-way chairlift system between Zugliget and the highest point in the city.

Possibly the world's largest hourglass only needs to be reset every New Year's Eve.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Once the home of a hermetic monk, this cave now houses a small church.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

Legend says if you stick your thumb in the hole and it gets wet your wish will be granted.

Stay in the one time home to one of Scotland's most notorious gentleman's sex clubs.

Built during the Scottish boom in the oil industry, the village was never inhabited.

Twice a year, this Orkney town hosts a rowdy game of medieval mob football.

Fifty years of contamination in Scotland's waters.

A cross marks the spot in a small Scottish village that claims to be the exact center of the country.

This 1,300-year-old marker is one of the finest and most complete early Christian crosses in Scotland.

The abandoned transportation hub hides within the Glasgow attraction it once served.

This single-track road rewards brave drivers with stunning Scottish scenery.

Built to hold the worst of the worst of the Nazi war prisoners.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.