An easy-to-miss garden in Boston's North End honors the mother of JFK and others who lost children in WWII.

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

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

One of the now-less-hidden floral gems of the "Emerald Necklace."

This supermarket is suspended 25 feet above an interstate highway.

A historic bridge with a lovely acoustic anomaly.

Ironically this massive termite is the mascot for a company that is acclaimed for killing his kind.

This small-town pizzeria won the Hollywood lottery.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

The world's first permanently occupied mountain-top observatory continues to report on the stars.

An extensive collection of ancient Egyptian artifacts and mummies.

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

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.

A giant Troll lurks under one of Seattle's oldest bridges.

Granting the right of way to ships over surface traffic since 1917.

This former coal gasification plant found a curious second life as a popular public park.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

A wall of chewing gum moonlights as collective art.

Soaring over the Niagara Whirlpool since 1916.

This unusual building straddles two countries.

Even Henry David Thoreau found this glacial pothole irresistible.