Twisted buildings adorn the banks of the Rhine river.

This futuristic German television spire is actually the world's largest digital clock.

This concrete church spent a period of its history as a World War II bunker.

No need to strap in for a "ride" on this walkable roller coaster.

This magenta statue commemorates the legendary marriage between a mermaid and the city's founder.

The last bastion of Roman presence north of the Alps looms over a German town.

Town of spiritualists and mediums in Florida.

A sprawling maze of used books piled from floor to ceiling.

This ancient octopus-like tree was saved from destruction thanks to shady reporting.

A gleaming white tower in ornate Indian style soars above the low-slung bungalows of north Tampa.

An oddities shop that dabbles in the deathly and beautiful.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

Former villa and estate of James Deering developed to preserve native tropical forests.

A memorial to legendary newsman, publisher, and owner of La Gaceta, the only trilingual newspaper in the U.S.

This tri-part waterfall is a little bit of fairytale beauty in the heart of Luxembourg's Little Switzerland.

This Luxembourg cave is covered in cryptic looking marks left by mining activity.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

Two standing giants remain as a tribute to Luxembourg's metallurgical past.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.