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

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

A 32-acre fun park dedicated to all things cheese.

A spoke-tacular artwork constructed from recycled bicycle rims.

An old world fairytale-land with over 350 fairy folk figurines hidden amongst 800 year old cedars.

This covert museum showcases booties worn by a rescue dog and slippers owned by Queen Elizabeth II.

Thanks to its heroic service during WWII this Soviet castle has been turned into a monument towered over by a brutalist titan.

A suburban museum tells the story of a historic transportation network and even provides rides in antique trolley cars.

The world's largest bamboo labyrinth is a living demonstration of the plant’s immense potential.

This last stalwart of the now-forgotten feminist restaurant movement has been serving food in an activist atmosphere since 1977.

Assemble a masterpiece at the first and only North American school exclusively dedicated to mosaic art.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

Where the lovelorn find a home for their sentimental keepsakes.

Tintin's creator is celebrated in an immersive museum that's an astounding work of modern art.

Its eclectic exhibits range from the world’s first motorcycle to Luke Skywalker’s Land Speeder.

This striking structure is the Socialist-modernist centerpiece of a former Soviet spa resort.

A serene temple with stunning stained glass hides in downtown Dallas.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

This unique crypt designed by Frank Lloyd Wright for his longtime friend was not completed in either man's lifetime.

These rustic holiday homes are made from discarded fishing boat hulls.

Once one of the largest rooms full of books in the world, this bookstore basement is still a treat for bibliophiles.

The world's first interactive human body museum also serves as a chair for a giant orange man.

These abandoned vessels are destined to be reclaimed by the forest.