Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

A spitting ode to a German serial killer.

Böttcherstraße's bells, extolling Nordic virtues and the great conquerors of the world.

The floorboard scrawling of a tragic madman is on public display outside a Paris hospital, much to the dismay of its opponents.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

The former home of France's controversial pop maestro is almost completely covered in ever-changing tributes and graffiti.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

Saintly bones pressed into a wax effigy of a Catholic superstar.

A lone cannonball remains lodged in the walls of the Hotel de Sens as a sober reminder of a revolution.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

The remaining relics of the patroness of Paris lie in a chapel under a striking double spiral staircase.

This functioning parish church is also the site of many concert performances due to its wonderful acoustics.

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

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

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

Once a bustling fishing village and trading post, today these Cape Verde ruins provide a home only for seabirds and turtles.

This giant statue is the product of a mixture of corruption, Stalinist architecture, and North Korean manpower.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

Opulence and fantasy collide in this royal chair which is supposedly made with unicorn horns.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

The Hanshin Expressway goes right through its 5th, 6th, and 7th floors.

Taoism, Buddhist and Confucianism are all represented in this temple that claims to answer anyone's wishes.

The design of the Palacio Salvo has been described as "a lighthouse on top of a building."

Abandoned bull fighting ring, slowly falling apart in Uruguay.