The first purpose-built art gallery in the United States is once again open as a center of craft arts.

An overlooked oasis of quiet on the grounds of Washington's monumental basilica.

Home to a vast and influential collection of Shakespeareana.

An obscure public service from the U.S. government that redeems burnt, moldy, and soiled old greenbacks.

The oldest continuously operating fish market in the United States.

Largest Roman Catholic church in North America.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

Home to items never before seen by the public.

The remains of a chapel created for convenience.

North America's oldest authentic African Village.

The self-made house sculpture of an outsider artist who named himself "Chief Rolling Thunder."

A series of labyrinths in the Nevada desert inspire meditation and calmness.

Nearly 300,000 acres of wildlife, natural splendor, and a hidden ghost town have been designated a national monument.

This cave was hidden for thousands of years, storing the worldly goods of ancient Native Americans.

Nevada's largest cactus collection stands outside a candy mogul's small factory.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

The longest living non-clonal organisms on Earth.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

Florida’s first home built with eco-friendly hempcrete.

This glass-stain Mary attracted thousands of pilgrims until her head was shattered by a vandal with a slingshot.

This Florida museum dedicated to western artwork is entered through an artificial canyon with imported sandstone.

One of the best places in Florida to spot rare, carnivorous pitcher plants.