Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

Rare recess caves fill this unbelievably beautiful Ohio park.

10,000 flowered plants bloom in the City of Roses.

This unassuming cheese empire in rural Oregon churns out more than 150,000 pounds of cheese each day.

A midcentury ranch house hides a literal treasure trove of unique rocks and minerals.

Alleyway plaque commemorating the death of a fictional character in The Maltese Falcon, not far from the author's home.

Early prototype for Frank Lloyd Wright's Guggenheim.

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

A man-made island in scenic San Francisco Bay.

Golden Gate Park's historic collection of plants.

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

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.

San Francisco's newly reopened hands-on science museum.

Frank Lloyd Wright’s most iconic home dangles over a Pennsylvania waterfall.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

The wooden airship was the largest flying boat ever built.

For over 100 years, this Indiana town has had a tree growing out the top of the local courthouse.

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

The massive machine creates cracking displays of indoor lightning.

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.