The 19th-century home of Count and Countess von Hallwyl is now a museum.

Once the hunting reserve of a noble family, this is one of the few remnants of Pleistocene planitial forest in northern Italy that still stands.

A museum dedicated to one of Paris’s most famous residents, tucked into a corner of one of the city’s most famous squares.

A network of underground water channels that dates back to the Middle Ages.

The world's largest underwater restaurant is submerged off the southern tip of Norway.

By night, this auto repair shop turns into a taquería serving up some of the city's finest al pastor tacos.

Eat a Nobel banquet from any year in the basement of Stockholm's City Hall.

An island on the Venetian Lagoon hosts this stone chair that has nothing to do with the King of the Huns.

This picturesque monastery at the base of a cliff is a peaceful oasis open to all visitors.

A series of caves, tunnels, and wells filled with fascinating figures and symbols.

A reconstruction of a classic mansion on the island of Delos was designed for a historian and archaeologist.

This decaying complex from the early 1900s was once the site of massive iron and fluorite mines.

A Stockholm metro station is home to an escalator that is not only the longest in Sweden, but among the longest in the world.

This extraordinary, multi-pillared monument depicts the fascinating history of Georgia.

This camera store in Milan holds one of Europe’s largest collections of luxury-antique cameras.

A road that winds through this natural cave is the only way to access the small, appropriately-named village of Cuevas.

This 21st century cabinet of curiosities includes dinosaur bones, moon rocks, film memorabilia, and more.

The forbidden island of the Tuscan Archipelago may still contain buried treasure.

An unusual house built using an iso-elastic membrane.

An ancient artistic garden parlor full of hidden water wonders.

The astonishing collection of an infamous criminologist.

Eco-village hidden in the foothills of the Alps that created a massive system of psychedelic underground temples.

Southern Italy's spinning top village.

Walk through a fairytale in Tuscany.