This 1967 experiment in modular architecture was designed to be a new model for urban living.

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

Though strikingly beautiful, Seattle's other railway station is now largely forgotten.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

Georges Seurat’s pointillist masterpiece has been recreated in Ohio in topiary form.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

Moonbows over Kentucky.

The largest earthwork effigy in the world.

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

This chimerical bridge/tunnel appears to dead end right into the sea.

Dedicated to one of the darkest moments in Irish history, this memorial has faced its fair share of backlash.

Since 1947, this living history museum has been providing an immersive look at life in Plymouth Colony.

These 12th-century catacombs carved into a mountainside were a place of mysticism and Christian hermitages.

The remains of a failed canal can be found in several towns near Lake St. Clair and is known historically as "Mason's Folly."

This giant boulder is sandwiched between apartment complexes in upper Manhattan.

These chunky stone towers out in Lake Michigan are the key to Chicago’s drinking water.

This museum in the woods evokes the work and lives of Michigan's 19-century lumberjacks.

The plants form a living library and laboratory for researchers and students at Michigan State University.

A restored 114-year-old railroad station heralded as the most photographed depot in the United States.