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

The magic's in the hole!

An emporium for the weird, creepy, rare, and just plain gross.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

The clients of these mysterious hand-crafted funeral cars took their last ride in style.

One family's mission to exemplify sustainability took on a whole new life as a surprisingly beautiful home.

This magnificent abandoned hotel has long been haunted by its Nazi past.

A Swiss man built this airstrip for aliens because a UFO captain telepathically told him to.

Visit this odd display of indigenous style in Argentine wine country.

The most southern point you can drive to in the Western Hemisphere.

An Argentinian businessman facing terminal cancer built this whimsical medieval village using salvaged materials.

A tower devoted to — and modeled after — the Divine Comedy.

Xul Solar was an artist of alternate worlds, inventor of languages, and dreamer of utopias.

Stenciled handprints and wall paintings dating back 10,000 years, some of the earliest forms of cave art.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

Climb a set of vertiginous stone steps to the top of this impressive ancient edifice.

This column celebrates Rome's victory over the Goths, and may be the oldest Roman monument in Istanbul.

Ancient serpentine sacrifice holder that has stood the test of time.

A fountain standing as a testament to a doomed alliance.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

Legend says if you stick your thumb in the hole and it gets wet your wish will be granted.

Step back in time and witness the fall of Constantinople.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.