The fairy tale castle of the "fairy-tale king."

The Avenue of Mausolea is a series of grand palatial tombs.

Once a bustling fishing port, this semi-ghost town is now more than 90 miles away from the shore.

Neo-cave art on the macro scale.

The house that birthed The Old Man and The Sea is now a museum devoted to the old man who wrote it.

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.

The oldest Roman lighthouse still in use.

A marvel of technology a century ago, this disused power station now offers a lovely glimpse into the industrial design of the past.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

Looming communist pillar with a Czech twist.

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

A surreal museum of extraordinary industrial objects.