Copenhagen's celebrated theme park and gardens.

Ancient burial grounds of the wealthy.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

Beyond the usual stories that attend old prisons, this one has deep bloody undercurrents.

Crumbling hotel echoes with the sounds of the '30s.

American bison herd descending directly from a Bronx Zoo breeding program that saved the species from extinction.

Nature's biggest mammal swims in landlocked Oklahoma.

2300-year-old Roman road connecting the empire.

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

When ecosystems collide in the arid Southwest.

Enjoy an overnight at an old haunted B&B site of the Borden family murders.

Ancient snack bar of the Roman Empire re-opened.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

The taxidermied remains of a once-great parrot.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

The Connecticut village named for its subterranean thunder.

The final resting place of New England's last "vampire."

A time-capsule monument reminding future generations of the importance of efficient and effective use of natural resources.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

This is one really big nut.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The final resting place of New Orleans' most famous voodoo priestess.

The site of Billy the Kid’s most famous escape and the end to the Lincoln County War.