Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Before the more famous Royal Palace of Caserta, the king of Naples first commissioned this overlooked residence.

Pompeii's less famous neighbor is still revealing her secrets.

This bronze sculpture was inspired by a photograph of Martin Luther King Jr. and his wife embracing after he won the Nobel Peace Prize.

A men’s restroom became a sandwich shop.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

This massive store is home to an eccentric collection of vintage, retro, and peculiar goods.

This sprawling bookstore spans four floors and has more than a million books in stock.

The final resting place of many of New Jersey's most famous residents, including U.S. history's most in-vogue antagonist, Aaron Burr.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

These ancient ritual mounds are our best window into the culture of the ancient Mississippians.

This intricate Hindu temple is the largest of its kind outside of India itself and was constructed like a giant puzzle.

The Battle of Atlanta in 360 degrees, featuring a corpse that bears a striking resemblance to Clark Gable.

The largest puppetry museum in the United States houses the world's most complete collection of Jim Henson artifacts.

A grassroots community effort in the 1970s led to the creation of this beautiful garden full of delightfully whimsical exhibits.

A colorful square marks the heart of the city's LGBTQ community.

An oddity shop filled with taxidermy, funerary memorabilia, and more.

One of corporate America's best-kept secrets is also one of the most publicly displayed.

An underground magnet for ever-changing street art.

Civil War soldiers, captains of industry, and paupers all interred on historic grounds.

A popular oddity on display in a stately building, offering a symbolic commentary.

More than 200 unconventional musical instruments that anyone can play.

The Vermont square that inspired Shirley Jackson's "The Lottery."