Vines grow up the metal bars in this public park created from an old machine factory.

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

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.

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

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

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

Large Hadron Collider and the Birthplace of World Wide Web.

A breathtaking bridge that crosses a vast gorge over a river's torrents, and has a tale of a devil architect attached.

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

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

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

An old mining site that is slowly being reclaimed by nature.

A massive horizontal lever press comprising parts from the 17th century.

This abandoned IDGZ station was one of 49 troposcatter stations in the NATO ACE High network.

This unique museum is home to over 5,000 puppets of all types.

A portrayal of two lamps embraced and in love.

Nearly 800 years old, this river lock is now a public park with a former fortified island.

Over 100 artworks are painted on the walls of this town, making it an open-air museum of contemporary art.

The first passenger cable car in the world.

The crumbling remains of a 19th-century textile factory.

The first Italian factory to produce locomotives is now a marvelous museum.

A completely underground tour following the path of the most precious element: water.

The link between these two seemingly disparate themes is crucial to the history of this Tuscan hill town.