This 19th century granite fortification is one of the most well preserved forts in New England.

While exploring the desert, you can stop by the home of a fictional heretic from a parallel universe.

The world's largest set of the ten commandments lay nestled in the heart of the Great Smoky Mountains.

Amazing meticulous gardens of personal wood carvings, Hydrangea, Canna, and many other flowers.

Early prototype for Frank Lloyd Wright's Guggenheim.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

Golden Gate Park's historic collection of plants.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

One man's extraordinary topiary garden in a small South Carolina town.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

World's first "penitentiary," meant to be humane, drove men insane.

A layered tribute to the work of mosaicist Isaiah Zagar.

Dr Barnes' $25 billion private collection of art and arboretum.

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

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

A nourishing complex of found object art, paintings, and sculptures that celebrate key figures in Black history.

This giant iron playfully pays tribute to an early 20th-century architectural trend.

A wonderful display of arts and crafts handmade by local artisans in the Southern Appalachians.

This rare basilica nestled right in downtown Asheville is an architectural marvel, inside and out.