A preserved dragon's rib that remembers the legend of the founding of the city of Atessa.

Real bones which are said to have belonged to a Polish dragon.

An underground city of salt.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

A mysterious structure left behind on the Polish mountainside, sometimes called "Hitler's Stonehenge".

This iconic fortress was once the crown jewel of Haiti's national defense.

The once great capital of Egypt now crumbles forward as evocative ruins.

The Avenue of Mausolea is a series of grand palatial tombs.

Reputedly haunted sandstone necropolis with exquisite stone carvings.

Enormous sandstone towers loom within a Czech forest.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

This centuries-old wooden wonder was built in less than a year and is one of Europe's largest timber-framed churches.

This mysterious and once-grand memorial still embodies a remarkable architectural vision.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

This stunning concert hall has become a symbol of Iceland's national recovery.

Experience a quartz crystal sound bath inside a storied, all-wood sound-chamber.

One of England's most famous churches hides a pair of little known architectural treasures.

An abandoned mine now resembles a post-apocalyptic landscape of derelict buildings and blood-red pools of water.

A glittering Thai Buddhist temple in suburban Pennsylvania.

This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.

The world's largest historic armory was established by independent citizens to defend themselves from the wars of larger forces.