An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

With a floor made of thick glass, this observation deck offers a full view of Sunwapta Valley's mountains and rivers.

Two men built this castle on the Florida coast as an artistic “landscape sculpture.”

This tower pays homage to a legendary Viking fort established in Massachusetts that never really existed.

The two writers famously didn't come to blows over the Oxford comma.

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

The oldest continuously inhabited private home in the United States.

Enormous pendulum helps keep Taiwan's tallest building from swaying.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

At night, this glittering musical tunnel draws skaters and photographers.

An enormous alien invades Woking, England, as an homage to the H.G. Wells classic 'The War of the Worlds.'

A different kind of swan princess.

The ruins of a small church belonging to a powerful Scottish family still hold the remains of its patriarch.

A fifth-century temple improbably built into the side of a cliff.

Oldest church in the United States that is still in continuous use.

Six tiny houses built for working class people form the largest intentional cluster of Wright homes anywhere.

The largest wine cellar in the world is a 150-mile network of underground caves near the capital of Moldova.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

The “Grand Canyon of Maine” is a three-mile gorge full of striking geological features.

The world’s tallest outdoor lift stretches along the stone pillars that inspired the floating mountains in the movie “Avatar.”

19th century pendulum and a clock restored by a rogue group of guerilla artists.

A series of caves, tunnels, and wells filled with fascinating figures and symbols.

A marble Lucifer hides behind the pulpit of this Gothic cathedral.

Nicknamed the "Grand Canyon of the North," this open-pit mine in Minnesota has a much shorter history.