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

The world's largest wooden structure.

This 19th-century fountain features sculptures of little gnomes that help with chores.

The bones of the Biblical Magi traveled to Constantinople and Milan before landing in their current home inside an elaborate golden reliquary in the Cologne Cathedral.

Long before the hollyhocks and colorful facades, this lane was notorious for witch trials, infanticide, and prostitution.

At these downtown crossings, pedestrian lights show axe-wielding Vikings instead of the usual walking figures.

A public display of random paleontology.

The final resting place of the author who gave us the Little Mermaid, the Ugly Duckling, and many more beloved fairy tales.

Preserved "bog person" that is over 2,000 years old.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

This colorful artistic feature atop a Danish art gallery allows visitors to stroll through a rainbow.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Head underground and take a tour of the city's working sewer system, and see the underground river Senne, which defined Brussels for centuries before being covered in the 19th century.

A little sculpture with a large wardrobe.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

Climb inside an iron crystal magnified 165 billion times its normal size.

The world's largest monastic library is also a baroque artistic masterpiece

A museum capturing one of the world's most famous classical composer's battle with hearing loss.

Along the edge of this fountain are 365 smaller fountains that represent the days of the year.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

The topiary maze at the Habsburg hunting lodge.

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