A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

Olfactory delights in San Francisco's Botanical Gardens.

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

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

The rocks in this arid basin leave trails of movement behind them.

A trash dump made beautiful by nature's power.

Resting place of Hollywood's immortals is also site of summer film screenings.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

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

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

This neo-Gothic former auto showroom is one of the few remaining reminders of Brooklyn's "Automobile Row."

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

Historical figures from New York City's Catholic community reside in Midtown.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Visit the monolithic tomb of America's most famous general.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

In 1958, an MIT fraternity pledge laid down on this bridge and instituted a new, unique unit of measurement.

A centuries-old church stands as a testament to Boston's "father of architecture."

This nearly 200-year-old restaurant's history includes an exiled French prince, JFK, and a very hungry Daniel Webster.

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

This historic patch of real estate offers a glimpse of colonial Boston.

Tragedy on Little Brewster Island memorialized.