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

A temporary art piece to celebrate LGBTQ Pride is now a permanent part of Stockholm's traffic landscape.

Small Easter eggs are hidden in the ventilation holes of the city's newest trains.

Uppsala's adorable feline sign celebrates a popular children's book set in the Swedish city.

The final resting place of the father of modern biological taxonomy.

A second generation sun-powered marvel lights up the night.

The unbelievably opulent home built for an infamous newspaperman.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This ossuary is more than five centuries old and is heralded as one of the finest in Switzerland.

For hundreds of years, this huge figure has been blessing visitors before they explore his body.

A fairytale island floats in the middle of Italy's little-known Lake Orta.

Destroyed numerous times, this centuries-old bridge has always been rebuilt with its original design.

It’s said this crypt was the setting for the tragic finale of the Shakespeare play.

One Italian taxi driver covered his entire house in small seashells creating a weird bit of architecture that is preserved to this day.

What appears to be an ancient Roman temple is actually a Catholic church.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

A monument to the one-armed geologist who led the first documented expeditions through the Grand Canyon.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

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

Ancient artists in the middle of nowhere.

Far from the shore, this sandy victim of the Skeleton Coast looks like it was plopped in the middle of the desert.

A desert that rolls right up to the ocean, where it's so dry animals live off the fog.