A former waterfront market is now in the center of town due to some interesting Boston engineering.

The Old Mill shown in the opening credits of “Gone With the Wind” is actually fairly new, and was never a mill at all.

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

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

A man-made island in scenic San Francisco Bay.

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

Golden Gate Park's historic collection of plants.

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

A unique and poignant sidewalk mural commemorates the deaths of two striking workers.

This contorting sculpture is the tallest in San Francisco.

A Reformation-era fiery figurehead once denoted this location as a print shop.

The preserved left hand of a saint once known as "the Pearl of York."

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

One of three sites in England that house the National Collection of Arms and Armour.

The bizarre headgear looks like it was made for a fool, not a king.

A monolith stands at the site of the most significant battle ever fought on British soil.

At 22 feet tall, these Bronze Age monoliths are some of the tallest standing stones in the United Kingdom.

One of the oldest and certainly best preserved Cistercian abbeys still in existence.

This Gothic Revival castle used as a shooting location for "The Secret Garden" and other films.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

Hidden inside this Arizona fast food franchise is an in-depth exhibit on the famed WWII counterintelligence program.

A monument to the one-armed geologist who led the first documented expeditions through the Grand Canyon.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

The Sun King's military models, saved from the Louvre.