Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

Copenhagen's celebrated theme park and gardens.

One of two giant blue cockerel statues erected with an intentional double meaning.

Eight "Guardians of Health" protect this art deco water tower from pollutants and bacteria.

This old residential building was once the largest flour mill in the world.

The world's largest floating loon bobs in the lake to kick off an annual festival.

The "dragon babies" of southeastern Europe.

This historic timepiece is thought to be the only public clock in the world that keeps lunar time.

The palatial McDonald's that inspired Wesley Willis.

Illegal drag racing two stories beneath Chicago’s streets.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

105-foot wide giant metallic flower blooms anew every day in the heart of Buenos Aires.

This large round boulder is said to emit spiritual power, but it may just be magnets.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

Sleepy Minneapolis block beats Guinness Record for most churches on one city block.

A treehouse assailed by the elements and the government, now gone.

A whimsical sensor instrument for Minneapolitans to play on their walks to work.

Giant six-pack could provide one person a six-pack a day for 3,351 years.

One of the last surviving C-97s sits in a field in front of a Wisconsin inn.

A bizarre house filled with an astounding array of collections.

A true roadside icon standing on the same plains that the herds once roamed.