Hot springs monkey spa in the middle of Hell's Valley.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

Medicinal spa created with the discharge from a geothermal energy plant.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

This small museum dedicated to the painful memory of segregation is essentially a time capsule.

This railroad and oil tycoon's lavish estate now stands as a time capsule of the Gilded Age.

This restored farmhouse is a time capsule of a 19th-century Colorado homestead.

Piled high inside this warehouse and coffee shop are salvaged goods that span every corner of the globe.

The beauty and the beast of hydraulic mining is on full display at this California Historic State Park.

One of the few Glatt kosher delis in the United States is a cornerstone of its Hasidic neighborhood.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

Try your hand at old-fashioned coffee growing at this museum devoted to one of the world's most coveted beans.

Rare moles meet activism at this Oaxacan eatery.

Once a lonely sentinel on the edge of the Great Plains, this rebuilt trading fort offers a glimpse of life on the Santa Fe Trail.

Seriously good slices of Sicilian pizza lurk at the back of the Bronx's oldest enclosed market.

Victorian "Fancy Craft" Hair Wreaths and Relics.

A rare kind of blue bear can be found chiefly in the national park that shares their name.

This historic collection of Native Alaskan artifacts was resurrected through a partnership between the WPA and tribal artisans.

This three-mile concrete levee in Pueblo, Colorado was transformed into the world’s longest painting.

The remains of an early 1900s dude ranch that operated until the 1970s.

A prehistoric rock shelter that's literally in someone's backyard.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.