This neighborhood of futuristic ball houses looks like an alien settlement in a science fiction film.

An early 19th-century English style garden hidden in the Rotterdam cityscape.

A UFO-shaped event building originally intended to be a science museum showcasing the future.

A true Valhalla for cactus and succulent lovers.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

The vast chamber inside this abandoned cooling tower looks like something out of a sci-fi dystopia.

Abandoned since 1998, this train station has become an oasis for urban explorers.

This old, abandoned hotel offers magnificent views.

A collection of weird and wonderful art fills a former houseplant nursery.

Nature is slowly overtaking this disused cemetery on the outskirts of Brussels.

This abandoned Belgian fortress is purposefully being left to nature.

A magical and peaceful ruined Cistercian abbey in what is now southern Belgium.

Plenty of old carney magic still haunts this photogenic amusement park.

Tracking the 1,500-year history of Korea's star cabbage.

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

A 16th-century monastery boasts a lush array of plants native to Mexico’s most biodiverse region.

Nevada's largest cactus collection stands outside a candy mogul's small factory.

An alluring, arid botanical garden home to a bewildering variety of cacti both endangered and common.

A unique walk through hundreds of cactus plants, including some that stretch over 8 feet tall.

Explore the wide world of desert plants at this unique Palm Springs botanical garden.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

A Saint Nicholas-themed ghost town in the Mojave desert.