Curious cave that stays a cool 56 degrees all year long.

A moody and picturesque riverside ruin overgrown with vegetation.

Memorial of the Salem witchcraft hysteria in the town of Danvers, where it all began.

The headquarters in Salem doubles as an occult art gallery.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

America's original house of worship for Spiritualism, the religious movement based on communing with the dead.

The Boston square dedicated to the dark poet who was born nearby.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

This hidden sculpture garden full of Wild West art is one of San Antonio's best-kept secrets.

The bullet-riddled wall from the St. Valentine's Day Massacre, bloodstains enhanced for your viewing pleasure.

A historic Civil War estate-turned-museum looks back on the Confederate States of America.

One of the world’s largest and deepest freshwater springs, where mastodons once roamed.

Largest pre-Lent festival in the Dominican Republic.

This trio of Dominican cave lakes comprise a colorful biosphere of natural life.

With its webbed walls and bright red coloring, Calgary's iconic bridge looks like a finger trap puzzle stretched across the river.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

An architect's childhood fantasy treehouse made real.

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

Native Americans built this circle of stones, which was used to predict astronomical events.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Nuclear reactor created the plutonium used on Nagasaki.

Legend says that these tall basalt pillars are the petrified wives of a trickster god.

Twin Peaks' real life Double R Diner has been restored to its damn fine television look.

A wall of chewing gum moonlights as collective art.