Deep in a Polish forest, this collection of Iron Age megaliths still holds onto many of its ancient secrets.

This fairytale inspired, warped building houses restaurants, shops, and a radio station.

The traditional Polish croissant, folded 81 times into the shape of a horseshoe, is a legally protected cultural treat.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

Special benches that play Chopin's music are scattered throughout his native city.

A tree planted by Marie Curie is treasured by the Radium institute that she set up.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

The world’s narrowest house makes for an awkward, four-foot-wide living space.

This cheese shop also houses a museum devoted to Dutch dairy.

The shiny silver little brother to Copenhagen's Little Mermaid statue.

In this scale model, our neighboring planets are represented by metal spheres spread across an English village. The nearest stars are represented by spheres in California and Australia.

Eclectic collections, artwork, and some feline friends fill the writer's former home.

The historic home of the pivotal political activist who led the Métis people in rebellion against the Canadian government.

The intense competition of the 19th-century fur trading industry played out at this fort in Western Canada.

The world’s first museum dedicated to exploring human rights unleashed a wave of controversy.

This unusual building straddles two countries.

A display of everyday life in the area that was unveiled during the 2012 Summer Olympics.

Where the lovelorn find a home for their sentimental keepsakes.

This only museum in the world dedicated solely to mushrooms.

Every year, the colorful murals of Montreal get a complete makeover.

Industrial ruin decimated this tiny New England company town in a fashion no one saw coming… and even fewer remember today.

At more than 5,000 years old, these structures are among the oldest free-standing stone buildings in the world.