The world's longest known cave system.

A former 19th-century tavern, famous for its peach brandy and honey concoction.

This replica of the Greek structure is in the heart of Nashville.

An attack on a prominent Black attorney's house sparked a watershed moment in Nashville's civil rights movement.

This award-winning men's bathroom was just too beautiful to not allow women to see.

The grave of America's 11th president is not in some grand monument but instead it's hidden away on the grounds of the Tennessee Capital.

A patch of contaminated land reclaimed as a scrappy sculptural oasis.

The vaulted ceiling is home to a scurry of “squirrelgoyles.”

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

This museum explores the history of stickers and is home to RePEELed, an exhibit featuring sticker art from around the world.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

A gateway to a mysterious network of underground tunnels.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

After Christopher Columbus died, his son built a fancy house to rule from.

The first official clock in North America, it kept time for the Spanish government of Santo Domingo.

The oldest colonial fortress in the Americas was once the home and later prison of Christopher Columbus.

Built in 1512, the oldest cathedral in the Americas.

A remarkable range of flora and fauna are represented in this Dominican nature preserve.

The first hospital in the New World.

The 92-foot-tall structure is based on the aircraft that carried the first Americans into space.

A museum dedicated to "science, history and the arts" little changed since 1915.

Beautiful hillside Vermont cemetery with amazing funerary art.

A Civil War Museum with some notable medical antiques.

Learn all about this iconic air rifle without putting an eye out.