This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

Eulogizing an unknown man's unusual demise.

This is probably not the Target you're looking for.

This ruined travelers shelter sits abandoned in a desolate bog of Flow Country.

A remote island holds what claims to be Scotland's smallest cinema.

An abandoned water sports stadium that has become a haven for graffiti and decay.

A community of collapsing homes more than a mile out from the Florida coast.

It turns out that a hurricane-prone beach is probably not the best place to house wild animals.

A steamer run aground near Bimini lives a second life as a playground for scuba divers.

A paradise hotel turned from opulent to overgrown.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.

Climb into Albania's communist history while enjoying a spectacular ocean view.

This abandoned Olympic skiing facility still bears the scars of the Siege of Sarajevo.

This top-secret nuclear bunker hidden in a Bosnian mountain has been converted to a modern art exhibition space.

An abandoned brutalist monument whose history has been lost to the ages.

This brutalist monument is inscribed with 9921 names of Yugoslav partisans who perished during WWII.

An Italian hillside ghost town.

Though an earthquake destroyed this village in 1980, one former resident still walks its streets every day.

The abandoned summer estate of the former Greek Royal Family.

This pink watchtower served as the seat of the Greek government after independence from the Turks.

This church combines Christian, Byzantine, and ancient Greek architectural elements.

A closer look at this somewhat faded hotel by the Corinth Canal reveals the architectural undertones of a genius.

This enormous abandoned prison was once dubbed the "Bastille of Romania."