Covering 13 acres and hosting 3,000 shops, this is one of Africa's biggest urban markets.

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

This aged paving stone, marked by a maiden's foot imprint and the tales of her plunge from the cathedral tower, serves as a memorial to a tragic local legend.

This risqué sculpture, based on a Hans Christian Andersen fairy tale, caused outrage 35 years after it was erected.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

Several cannonballs of mysterious origins decorate two buildings in Stortoget's main square.

It houses the remains of a 17th-century version of the Titanic.

Sweden's "good old days" painstakingly re-created in a model village.

Stockholm's narrowest alley is barely over two feet wide.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

The design of this beautifully crafted building was inspired by Norwegian glaciers.

This floating sculpture of ice is a poignant reminder of nature's power.

Longest road tunnel in the world features an air treatment plant and the illusion of daylight.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

Tubing through a cave lit with glowworms is a magical underground experience.

No one knows how many bodies are in this vault in a Chicago public park.

Known as the “Official Greeter of Juneau,” this dog still welcomes ships and their passengers to Alaska.

A whale of a public art display towers atop Juneau's cruise ship dock.

Impressive artifacts from Juneau's gold mining days fill this mining site-turned-museum.

A 30-mile-long glacially-carved canyon leads to a massive pair of glaciers.

The first Russian Orthodox church in North America and an Alaskan landmark.

Low tide reveals 8,000-year-old rock carvings in Southern Alaska.

This historic collection of Native Alaskan artifacts was resurrected through a partnership between the WPA and tribal artisans.

This little gem of a museum is a hidden jewel filled with prehistoric treasures.