Lucerne's central prison was converted into a tourist hotel with a bare minimum of changes.

The largest underground lake in Europe.

The oldest surviving wooden bridge over Rhine lets travelers cross easily from Switzerland to Liechtensten.

A 22-million-year-old sandstone cave is a natural habitat for award-winning cheese.

Swiss vineyards in a UNESCO heritage site.

Traversing steep Alpine slopes, this engineering marvel is one of the longest and highest funiculars in the world.

A cablecar-station-turned-revolving restaurant with 360-degree views of the Swiss skyline.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

A once-thriving hotel in the Swiss Alps couldn't compete with climate change.

A historic observatory precariously perched at the "Top of Europe."

This is not only one of the oldest collections in Europe, but also possibly the most beautiful.

This amazing pedestrian suspension bridge in the Swiss Alps would give Indiana Jones nightmares.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

This house's itty bitty size means no humans allowed.

This home is decked out like a psychedelic explosion of colors and bowling balls.

Nestled on the banks of a river in Nuremberg is a small museum that was once home of the city's official executioner.

One of the last of the great 1920s movie palaces is a Floridian Greco-Spanish-Persian dreamscape.

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

The oldest operating Mississippi River–style steamboat still navigates the Ohio River.

You can climb to the summit of Black Mountain, as long as you sign the waiver.

This boulder stays on its mountain thanks to a huge chain and on the map due to local legend.

An aviation relic that made coast-to-coast travel possible.

Visit these gentle, bell-bottomed, exquisite equines at the home of North America's first Gypsy Vanner horses.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.