The ruins of this mining boom town stand like skeletal reminders of the settlement's dark history.

The meaning behind this triumphal Roman arch was a mystery until the early 20th century.

Located outside Medellín, this Colombian park focuses on conservation and sustainability.

Magnificent Roman ruins lie vulnerable to destruction on the edge of the Mediterranean.

This enchanting natural park is a magical example of a temperate rainforest in Europe.

70 years of foreign military influence on the shores of Tripoli, Libya.

This preserved wilderness hides the remains of a colonial grain mill used to feed George Washington's troops.

A Viking man's tribute to his brother stands in Gävle's oldest church.

If there is one thing you don't want to be in Sweden during Christmas, it's a Yule Goat.

Not quite the cultural gateway between China and Sweden its designer imagined.

This museum offers an actual time machine back through Colorado's past.

A vast and opulent collection of art and show dog memorabilia collected over one man's lifetime.

Amid the marketing blitz of modern Times Square is an elegant holdover from its showbiz glory days.

This New York estate was designed to resemble a medieval Scottish castle.

An extraordinary house museum and cabinet of curiosities in the heart of Florence.

This bright yellow building is packed with sweet treats from all around the world, from chocolate-covered crickets to whoopie pies.

Once a mortuary that held the remains of Buffalo Bill, this Denver hotspot is now a death-fixated restaurant.

This massive redwood tree has a hole in the base big enough to drive through.

A trash dump made beautiful by nature's power.

This whimsical seashell-shaped place of worship was designed to blend into its surroundings.

The quirky salon doubles as a retro museum run by the world's leading "hairstorian."

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

More than 5,000 contemporary and "historic" mustards from around the world.

A hundred-year-old museum filled with giant physics toys and experiments designed by grad students.