Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

An enormous, inside-out glass globe built in 1935.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The massive machine creates cracking displays of indoor lightning.

This bronze sculpture was inspired by a photograph of Martin Luther King Jr. and his wife embracing after he won the Nobel Peace Prize.

A men’s restroom became a sandwich shop.

Created by a local artist, these quirky sculptures each have their own names and personalities.

The final resting place of the first documented Chinese person in the United States lies in a Boston cemetery.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

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

A beacon atop a downtown building provides Bostonians with weather forecasts and baseball news.

A gift to the children of Boston, this bronze bear represents playfulness, a spirit of love, and the warmth of big hugs.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

The world’s largest concentrated solar plant generates as many problems as megawatts.

This former shopping outlet is now adorned with beautiful graffiti and murals.

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

This one has sailed five times as far as Sir Francis Drake's famous ship.

The ritual has been performed uninterrupted for nearly 700 years.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

This luxury shopping lane has been protected by its own tiny police force for over a century.

Where condemned pirates met their grisly end at the gallows on the River Thames.