A beautiful deserted greenhouse in the middle of a park.

Enormous lake at the bottom of a unique cave system.

A beautiful Victorian-era cemetery, complete with a miniature village.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

Started as a kitchen garden, now the second largest botanical garden in the world.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

A giant Troll lurks under one of Seattle's oldest bridges.

Notorious artist squat renovated into legal studios.

Dramatic river bend surrounds a natural red-rocked pedestal.

On Japan's Tashirojima Island, cats are king.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

This massive library holds what was once the largest book collection in the world.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

The world's only museum devoted to the wonders of fluorescence.