Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

Visit this playground of waterfalls, caves and sinkholes.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

The oldest surviving synagogue in New York City is now a soaring art space.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

A colorful architectural gem in Seattle's uniquely modern Central Library.

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

Rustic natural hot springs in the deciduous rain forest.

Mysterious 500-year-old tapestries depict a unicorn hunt.

The largest earthwork effigy in the world.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

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

An enormous roadside pan tells the story of a battle for pie glory.

Known as the “Official Greeter of Juneau,” this dog still welcomes ships and their passengers to Alaska.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

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

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

European castle ruins in an American state park are actually the product of death and grief.

World's second largest particle accelerator, where nature reveals its secrets.

Complex aquaponics systems allow fish and plants to grow in harmony.

At this Wisconsin museum there are real ducks, fake ducks, duck calls and a Duck Blind.