This Art Deco airport was once deemed “the air hub of the Americas.”

Not far from a popular beach, an unfinished, abandoned mansion for Bulgaria's last communist dictator.

A site where ten to twenty thousand Edo-era prisoners were put to death.

The only geyser in the state of Pennsylvania is caused by pressure from an abandoned coal mine outside of the ghost town Centralia.

An abandoned asylum incorporated into a college campus.

The last of three massive blast furnaces that were once at the foundation of the Port of Sagunto economy.

This large Sitka spruce that appears to be floating in mid-air, has defied logic for years.

Every September, international competitors flock to a tiny Scottish island's flooded quarries.

Once the most densely populated place in the world, this island is now a ghost town.

Meet the world's longest tapeworm in a collection that really gets under your skin.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.

The magical, mossy forest that inspired Princess Mononoke.

Tokyo’s only Vaudeville-cuckoo clock–steampunk-Victorian curio cabinet time piece.

A magical place that lets you play in and explore the world of Studio Ghibli.

The cursed island of black pebbles.

A condom-covered Thai restaurant that is more concerned with birth control than food.

A modern temple with an ancient philosophy.

Thailand's distressed elephants find peace at this Chiang Mai sanctuary.

A tall karst islet popularized by 007.

At the right time of day, sunlight floods through the roof of this cave and illuminates the small pavilion hidden within.

The site where the famous city gate once stood, now in the middle of a playground.

A wooden prison doesn't sound like a good idea, yet this abandoned 1950s detention center still stands today.

Approximately 300 million years ago, a massive coral reef existed in what is now the largest limestone cave in Japan.

These wondrously illuminated caverns extend under the mountains of the Fukushima Prefecture.