The world's longest and deepest train tunnel.

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

Extensive private collection of authentic Medieval devices used for human torture and execution.

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

This secret Swiss fortress is disguised as a harmless pink house, complete with fake windows.

Abbey built on the ruins of Roman catacombs.

A symbol of friendship between the mountainous regions of Switzerland and Bhutan.

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

The last woman executed for witchcraft in Europe is remembered in this Swiss museum.

A tower-like theater in the Swiss Alps built to withstand the high winds and avalanches of the mountain pass.

Enormous, fluffy dogs frolic around this museum dedicated to a legendary Saint Bernard.

Swiss vineyards in a UNESCO heritage site.

A Swiss board game museum housed inside a picture-perfect castle.

Over 3km of caverns and caves at the Switzerland-France border contain the largest underground river in Central Europe.

This simple apartment may have inspired some of the most important theories in the history of science.

For centuries no one knew there were hundreds of bones and precious artwork hidden beneath this Swiss church.

150-year-old satirical tableaus made from stuffed frogs.

One hundred years ago this small house in downtown Zürich became the birthplace of the Dada movement.

World's largest permanent maze made of 18,000 conifers.

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

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

The steepest classic funicular in the world glides along a dizzying incline.