Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

Spiral alpine structure provides an alternative experience of viewing the Matterhorn.

The second-highest train station in Europe.

Its collection commemorates the author of the iconic children's book "Heidi."

A Swiss magician's vault of oddities.

The largest underground lake in Europe.

A communal oasis on Lake Zurich.

Abbey built on the ruins of Roman catacombs.

Florentine Renaissance style building in Switzerland, home to the world's largest taxidermy Great White Shark.

This eclectic architectural gem played witness to Zurich’s colonial past.

An 11th-century fortress home to one of the most influential royal houses in medieval Europe.

Where Mary Shelley’s "Frankenstein" and John William Polidori's "The Vampyre" were born.

Swiss vineyards in a UNESCO heritage site.

A mythically themed self-built sculpture park.

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."

Caves famous for the dragon-slaying saint who lived there.

These spooky and unusual stone formations create an underworldly landscape.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

Designed to resemble foreign architecture, this mosque-looking structure was used to pump water to a royal fountain.