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

This ultra-modern wooden boardwalk turns the ocean into a swimming pool.

Danish observation tower designed to look like a giant beer bottle.

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

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

The largest bottled beer collection in the world holds over 22,000 unique beer bottles.

A novel collection of medical curiosities housed in an 18th-century surgeon training academy.

Visitors are treated to a stained glass kaleidoscope interior inside this work of art.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

A little-known cafe in an old copper bridge tower with 360-degree views of the harbor.

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

Traditional Danish spot where the schnapps are flowing and the smørrebrød is loaded.

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.

An "evil painter" included pointed symbols in this artwork to poke fun at members of the Danish Parliament.

A collection of noses tucked inside an art museum reveals how times have changed.

The art museum is decorated with creatively remodeled pre-Nazi swastikas.

Copenhagen's celebrated theme park and gardens.

The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.

This pair of gilded girls atop an Art Deco building in Copenhagen were built to function as a weather indicator.

Downtown Minneapolis mixed art and function by turning some of their sewer covers into works of art.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

Every animal in the torah taxidermied and crammed into a Brooklyn townhouse.