Religious statues built because of one man's bargain with God fill this peaceful sculpture garden.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

A replica of where the Last Supper was held.

Twelve plaster figures inspired by da Vinci's famed painting haunt the desert landscape above a real-life ghost town.

More than 450 years ago, an Italian nun became the first woman to paint the iconic subject.

A painting in the historic Cathedral Basilica depicts Jesus and his disciples dining on a traditional Peruvian menu.

The ghostly remains of what was once the world's richest copper mine.

Terraced flowerbeds and rock sculptures in the midst of the Minnesota wilderness.

The ruins of Theodore Roosevelt's beloved ranch stand in a forgotten corner of a national park named after him.

These cinderblock farmhouses were actually World War II radar stations in disguise.

The world's longest known cave system.

The simple log cabin of a famed loner and naturalist stands preserved as a symbol of the ultimate DIY lifestyle.

This conservation area is also home to many of the region's desert tortoises.

This historic hotel on Bathhouse Row in Hot Springs National Park has a storied history of gangsters and baseball greats.

When ecosystems collide in the arid Southwest.

The only road through the heart of Glacier National Park.

Water of undetermined depth has attracted rare fish and cult leaders alike.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

Ten 25-foot-tall, beehive-shaped kilns, abandoned in Death Valley.

Windswept and remote, this island was once the home of a rare mammoth and today is home to a rare tree.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

An abandoned mine where dreams of quicksilver trickled away over 75 years ago.