This landmark cemetery in Boston was created more than 300 years ago.

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

Beautiful steampunk ghosts of early Massachusetts.

The site of Paul Revere's historic two lantern warning.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

An isolated island home to one of the oldest English-speaking communities in the region and Maryland's state dessert.

A relic of FDR's brief foray into utopian urban planning.

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

Eighteen miniature death-scene dioramas.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

The classic Atari game's iconic aliens have invaded downtown San Diego.

This futuristic bridge is one of the longest self-anchored pedestrian bridges in the world.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

The overgrown ruins of a once thriving World War I-era copper mine.

North America's largest accredited model railroad museum.

A large sculptural artwork and garden in Escondido, California.

Where there's quartz, there must be gold. Thus is the story of the mines of Julian, and the titillating times of the Gold Rush.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

San Diego's most historic and haunted home.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.