This small New York museum celebrates the mountainous artwork of a Russian mystic.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

A kaleidoscopic warehouse-maze of handmade neon signs.

A medieval house adorned with enigmatic carvings, including one of a man displaying his masculine attributes.

This 170-year-old Swiss guesthouse built into the side of a mountain is best accessed by a cable car.

This natural sea arch highlights Ireland's rugged coastal beauty.

The world's tallest box hedge is found in a delightful garden.

A rocky Irish outcropping with a history of wealth, conflict, and ruin.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Thousands of flowers create enchanting pink tunnels over the city streets.

This 600-year-old home seems to defy physics.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

An ancient Egyptian temple in the middle of Madrid, Spain.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

A daily pyrotechnic celebration marks a beloved tradition during Valencia's festival season.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

Beautiful tiles decorate many of the town's surfaces and stand testimony to its glorious artistic history.

A fiery-red region of scooped out land still largely untouched by civilization, tourists or otherwise.

A walkable map of the world, made from soil and stone by one man.

When it came to designing his own small office building, the eccentric architect wasn't afraid to show the world what he could do.

All aboard the world's longest miniature railway.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

Originally built as a promotional giveaway, this suburban house was designed to be an IRL version of the Simpson home.

A mining town once rife with murderous disputes over its copious treasures now creates income as a popular spot for photo shoots.