The third tallest lighthouse in America once guided author Stephen Crane to safety.

The ruins of a once-thriving sugarcane plantation that was burned in the Second Seminole War.

Pensacola's UFO home has withstood many hurricanes—just as the experimental 1960s design intended.

A circus legend leaves an unexpected endowment.

A monument celebrating the idea of reaching inaccessible places.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

Florida castle built with aluminum printing plates.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Japanese gardens dedicated to the Japanese farmer that refused to throw in the trowel.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

An exquisite collection of fairytale conveyances that puts most car museums to shame.

Elaborate tile work in this railway station tells the story of Portugal.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This huge pile of volcanic boulders hides a stunning network of secret grottoes.

This imposing memorial contains the remains of Che Guevara — and 29 other guerrillas who died with him in Bolivia.

Neo-cave art on the macro scale.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

A Cuban artist reclaimed his impoverished neighborhood as a dreamy folk art kingdom.

Thailand's distressed elephants find peace at this Chiang Mai sanctuary.

Only through deep darkness and tragedy did this elaborate royal palace become a sacred temple.

An underwater restaurant, surrounded by a coral reef.

Colorful umbrella-covered trees in Singapore's Little India look straight out of Dr. Seuss.