This ancient cave is home to a museum, bar, and is filled with fluorescent minerals.

Not your typical pet cemetery.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

One of the oldest, tallest, and most haunted lighthouses in America.

This stretch of highway is said to be haunted by ghosts of settlers whose graves were paved over.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

There must be a pun in this haystack somewhere...

A vibrant, 100-foot-tall mural dedicated to Evelyn Nesbit, the tragic icon of the Gilded Age.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

A bit of retro transportation flair preserved in the world's largest department store.

An out-of-the-way wildlife haven with a rich and storied past of harboring thousands of fugitive slaves, or "Maroons" during the mid 1800s.

This environmental engineering marvel keeps salt water from the Elizabeth River.

The historic “pink house on the hill” is an architectural gem that now serves as a center for water conservation.

A museum and tribute to a brave profession.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

A reproduction of earth's many biomes.

America's only nuclear missile silo open to the public.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A spiritual vortex among the red rocks in Sedona.

A monument to the one-armed geologist who led the first documented expeditions through the Grand Canyon.

Ancient pueblos built into the base of a natural canyon wall.

This historic national park is covered in the stunning ruins of red rock pueblos.

A mysterious spirit totem at the edge of Navajo lands.