These pretty kitties killed and ate as many as 135 railway workers.

This historic hotel invented the chocolate brownie.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

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

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

One of downtown Berlin's last reminders of its Communist past.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

The most visited, and possibly most controversial, museum in Germany.

The oldest continuously occupied public building in the United States.

This popular pilgrimage site offers a hole filled with holy healing dirt.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

A sprawling collection of over 106,000 toys from around the world.

A unique geological area spiked with wind-carved rocks that resemble teepees.

Despite time, colonization, and the brutal New Mexican heat, these Pueblo ruins still stand.

A multi-storied adobe complex has been inhabited for more than a thousand years.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

At the base of Steens Mountain resides an otherworldly desert.

A brief journey through early 19th-century pioneer life across Linn County.

This little slice of the Netherlands in the Pacific Northwest blooms in a rainbow of color each spring.

The oldest tofu shop in the United States is a firm favorite with locals.