Part of a highway network meant to connect Miami to Montreal, this 10-mile stretch of road made from red bricks is still around 100 years later.

The overgrown remains of one of the premier auto-racing speedways in the Midwest—and also one of the most deadly.

The final resting place of the world's first nuclear reactor.

The cheese slicer may be a Norwegian invention, but the biggest ones in the world are found in Sweden.

Once home to some 250,000 volumes and priceless art artifacts, this Polish estate was a target of bombing during World War II.

A bronze replica of an elm tree that honors the victims that perished in Pawaik Prison.

This colorful and quirky set of pegasus sculptures celebrate the works of poet Zbigniew Herbert.

Legend says this is actually a heartbroken prince waiting for his true love's kiss.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Order cookies baked by cloistered nuns in a 400-year-old monastery.

An ancient cave system in Tennessee’s Appalachian foothills converted to a 1,200-person music venue.

A restaurant with an extensive Irish whiskey bar also has several first editions of famous works by Irish authors.

The walls are decorated with whimsical murals painted by the creator of the Madeline franchise.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

This otherwise innocuous bodega was once the headquarters of the most feared assassin's guild in American history.

Built as a gift to the hottest tastemaker of the time, these hidden quarters remain an Art Deco showpiece.

Intertwined, interspecies trees which locals believe can grant boons to lovers.

You can find America's highest suspension footbridge at Grandfather Mountain in North Carolina.

A grumpy old water goblin guarding an old mill on the Devil’s Stream in Prague.

Loyal fans of one television's most famous painters still come to pay their respects.

A network of concealed passageways lies within a busy London Underground station.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

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