The walls of a colonial-era fort encircle a small, tropical assortment of plant life.

This sprawling woodland estate was the brainchild of iconic American industrial designer Russel Wright.

This enormous 32-foot painting depicts Poland's greatest medieval battle in glorious detail.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

This striking memorial is one of Estonia’s most controversial Soviet leftovers.

This ancient sword lay in a waterlogged tomb for 2,500 years, but managed to remain relatively untarnished and impressively sharp.

This botanical garden boasts sculptures, industrial ruins, and an endorsement from the Dalai Lama.

This frog-themed restaurant was frequented by Picasso, Saint-Exupéry, and more.

A sudden, striking cluster of hills south of Padua has been attracting visitors for centuries.

An emerald-green grotto just a short trip from Austin.

A dreamy mausoleum honors Persia's most famous poet.

The final resting place of the living embodiment of the famous Forest Service symbol.

This house is one of the most colorful in the country, and is the last remaining example of a historic villa.

A natural tidal swimming pool is ringed by bizarrely artistic lava rock formations.

A flower grows on this giant stone that is said be able to control minds.

This mountaintop lake bubbles and steams in a perpetual boil, thanks to its direct link to the Earth's interior.

A master plumber has turned his love of art and toilets into a folk museum that's not taking the piss.

The world's largest aggregation of great white sharks is at a mysterious spot in the middle of the ocean.

Inside this clubhouse is a cinephile's paradise.

This fantastical house shaped like a seashell brings aquatic design to architecture.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

This eclectic sanctuary is a hodgepodge of various architectural styles, all crammed into one building.

This tunnel entrance is built to resemble a grand castle but no one is quite sure why.

A remarkable geological formation resembling a forest made of stone.