The mummified relics of an American missionary.

The name of this tiny pocket park tucked between two buildings on Manhattan's Upper West Side is Latin for its location: "seventy-one."

Historical figures from New York City's Catholic community reside in Midtown.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Elevated freight railway turned wildly successful urban park.

Other-worldly rock formations and ancient fossils abound in this unique stretch of Nebraska badlands.

This Old Testament garden features 100 plants from biblical times.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

A piece of Seattle’s historic Chinatown preserved inside a modern museum.

The highest point in Washington state is a volcano covered in glaciers.

This former coal gasification plant found a curious second life as a popular public park.

A subterranean world of tunnels links several buildings of this rare 19th-century asylum.

Low-frequency noise compared to an idling train can only be heard by some of this industrial town's residents.

Home to a vast collection of The Wizard of Oz memorabilia and the site of an infamous theft.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

Famous church recognized for both its unique design and disciplined monks that live according to the Benedictine discipline.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

This mid-19th-century dugout was once home to a Swedish family as they erected their homestead.

The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

This remarkable collection devoted to the study of fish includes 1 million preserved specimens from all around the world.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

A scattered trail of street art adds a pop of color to the city's stark structures.