The ruins of a paper mill destroyed during the Civil War still tower over a tributary of the Chattahoochee River.

Hidden in magnificent rolling countryside, see what may be the largest modern stone circle in the world at Wisconsin's very own "Stonehenge”

A smaller model of the Da Vinci sculpture that took 500 years to come to life.

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

A picturesque example of brute-force engineering conquering nature.

These items are all that remain from the room used by the author during his second tour of the U.S.

California's first suspension bridge.

A breathtaking 19th-century trail overlooks Lake Tahoe.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

A year-long seasonal produce clock highlighting a variety of fruits and vegetables from across the Piedmont region.

Overlooking Puget Sound sits a garden with a Buddhist prayer wheel and an elaborate labyrinth.

Visitors to Salt Springs State Park are encouraged to literally put their two cents in Penny Rock.

A modern frieze of ancient Grecian mythological figures playing a national pastime.

A grove of "candelabra redwoods" deep in California's Lost Coast.

This tower commemorates the spot where George Washington hoisted the Grand Union flag.

When oil was discovered just outside of Pittsburgh, the city became home to this regional stock market.

This former nursery supplied plants for the creation of Chicago's largest park.

These three lighthouses played a fundamental role in the maritime life of Eastham.

This lonely gas station has stood at this location since 1917.

An artist weaves "wooden quilts" with scraps salvaged from his Katrina-damaged home in Tremé.

A devilishly named gorge that was a sign of salvation for many pioneers.

This Gothic castle was inspired by Erik the Red's Viking residence at Brattahlid in Greenland.

This abandoned church dominates the landscape of a former mining boomtown.

An abandoned coal mine reached by a steep hike.