When the water level in the Danube in central Budapest is low enough, there is a secret site telling the history of one of the most iconic bridges of the city.

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

Dive for drinks at Croatia's first and only underwater winery.

A subterranean necropolis blending Egyptian, Hellenic, and Roman traditions and art styles.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

A lush vertical garden blooming in the heart of Paris.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

The cultural center preserves the history of the Tlingit tribe, who have lived in this Alaska village for more than 10,000 years.

The last Viking king of Denmark is buried inside the crypt of this cathedral.

A spiralling hourglass-shaped tower rises from the forests in Denmark.

Opulence and fantasy collide in this royal chair which is supposedly made with unicorn horns.

This sublime architectural marvel is a rare example of an expressionist church.

Copenhagen's celebrated theme park and gardens.

A remnant of the Franco-Prussian War, lodged in the city's walls.

There has been an astronomical clock on this spot since the 14th century.

This hidden oasis features a stunning view of the Hudson River and the Palisades from a castle-like museum.

A church of bones, decorated with 40,000 human skeletons.

On a small Slovenian island, diners can mix and match a classic cake into dozens of sweet and savory flavor combinations.

Home to the deepest rift anywhere on Earth.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

A unique museum focusing on the history of carpets and fabrics from different tribes and eras in Moroccan history.

A floating cat sanctuary on an Amsterdam canal.

A naturally occurring tunnel in this Nordic mountain makes it look like it's been shot.