This cave holds a surprisingly colorful variety of geological oddities.

Software company Epic Systems has created one of the strangest and largest workplaces of all time.

It's believed Elvis Presley was inspired to write his breakthrough track after staying here.

This memorial marks the devastating day that Texas City was destroyed in a daisy chain of exploding ships.

A haunting—but not haunted—chapel remains in the woods.

Long before Europeans arrived, Native Americans built an artificial island out of shells that has withstood a millennia of hurricanes.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

4,000 monkeys used for medical testing on an island off of South Carolina.

Once luxurious, these oceanfront beach homes have been left to succumb to the elements as the beach is slowly washed away.

Where serial killer Aileen Wuornos drank her last beer.

A mesmerizing disco ball-like sculpture along the Sacramento River Walk.

The king of U.S. high points towers over every other peak on the continent.

The now-serene site of the largest earthquake ever recorded in North America.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

A small Richmond island dotted with the remnants of hundreds of years of history.

America's smallest "national forest" has only 33 trees.

The site of one of Japan's very few American occupations during World War II still holds the relics of a roundly disastrous campaign.

Ruins of a historic medical facility sits eerily by the water.

The snowbirds here are circus sideshow performers.

Manatees congregate around a power plant's discharge canal where the water is especially warm.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.