Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.

Copenhagen's celebrated theme park and gardens.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

This former estate of a fascist leader is now a burnt out ruin leading to a system of secret tunnels.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Where the lovelorn find a home for their sentimental keepsakes.

Explore the subjective dream of a hotel.

A 200-year-old tavern challenges guests to finish a glass of wine while hanging from a ceiling beam.

The bears of Bern have been a city highlight for over 500 years.

Swiss vineyards in a UNESCO heritage site.

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

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

Large Hadron Collider and the Birthplace of World Wide Web.

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

These spooky and unusual stone formations create an underworldly landscape.

This lovely little bridge hidden in a Switzerland gorge is essentially a fairytale.

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

An ancient church on a tiny island covered in stone bible stories has controversially been turned into a museum.

This museum was invented in a novel before being made real by the author.

Hidden just under the waters around this Turkish island are the ruins of a once great city.

A marvel of Byzantine engineering under the streets of Istanbul.

This Turkish cave boasts some rather bizarre associations with the King of Mount Olympus.