The vast, legendary catacombs hold secrets much stranger than stacked bones.

A seemingly desolate park that belongs to two countries actually supports all kinds of wildlife.

The intended purpose of this unfinished Elizabethan building remains a mystery.

Opulent period costumes and murals lead you on a journey through fashion history.

A beautiful collection of taxidermy birds and rare pomological wax models.

The block of aged dairy is probably still edible after 2,300 years in a peat bog.

Puppet theater and museum holding a collection of more than 300.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

A perilous medieval road leading right into the sea.

The sign at the garden gate reads: "These Plants Can Kill."

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

The first botanical garden, a feather in the cap of the Grand Duke of Tuscany.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

The Columbia Road Flower Market is now open every Sunday, rain or shine.

The romantic garden was the epicenter of the Hungarian art scene in the 1880s.

A wunderkammer of mysterious objects and stories.

For those late-night mollusk cravings.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

This Berlin island is home to a flock of free-roaming peacocks, as well as a historic ivory folly.

The music is over at the Ballhaus Riviera Ballroom, but the ballroom remains in haunting disrepair.

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.