This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

A careful eye can find hundreds of dinosaur tracks running along the Connecticut River.

A six-story treehouse offers spectacular views of New York's Finger Lakes region.

The little-known final resting place of one of America's greatest writers.

Floating man-made island and upscale restaurant.

Perfect your fly fishing technique on their practice ponds.

Depicting scenes of everyday life - and specific individuals - in Great Depression era San Francisco.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

Nuclear waste dump site now an environmental sanctuary.

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

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

A winding path built in secret on the edge of the continent.

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

Georges Seurat’s pointillist masterpiece has been recreated in Ohio in topiary form.

The monumental steeple on Amherst College's campus has no church attached to it.

The garage at the childhood home of Steve Jobs was a hangout for the founders of Apple, even if they never built computers there.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.