A strange, heartwarming, decades-old declaration of love on a New Hampshire roadside.

Booker T. Washington's home at the Tuskegee Institute was a gem of splendor.

Sweden's oldest animated sign is still lighting up the skyline today.

On rare days, this abandoned castle's gatekeepers open its doors, revealing the eye-popping splendor hidden inside.

This historic train station has been converted to a locomotive themed hotel.

One of Hungary's most influential places of learning is also home to one of the world's most beautiful libraries.

This 15-foot former Johnny Appleseed has given up his apples for donuts and coffee.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

This former prison is an Art Deco masterpiece with a past full of civil rights flashpoints.

A proto micro-nation sometimes populated by artists, surrounded on all sides by a Utah most barren.

A ghost town that held steady longer than most, but finally gave up the ghost.

The world's largest occupied bat houses hold hundreds of thousands of flying mammals.

Once a menacing challenge for trailblazers, this trail is now the most scenic drive in Utah.

The ruins of a Florida miracle spring resort make it seem like a wonder that this was ever a health spa.

This former Imperial summer home was the venue for a royal slap that once echoed 'round the world.

The ghost town where the villagers refuse to leave.

Research missiles and rainbow auroras at the world's largest land-based rocket range.

Fire meets ice at the southernmost volcano on Earth.

The largest hewn stone in history.

The world's largest model of our planetary system.

A Saint Nicholas-themed ghost town in the Mojave desert.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

The glowing blue Nymphaeum of Emperor Tiberius.

Costumed elves and mountain bikers co-exist peacefully at this abandoned Christmas-themed adventure park.