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

The 92-foot-tall structure is based on the aircraft that carried the first Americans into space.

The largest arcade museum in the world chronicles the golden age of video games which ended promptly in 1987.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Dim sum, served in a grand old theater.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

A real flying saucer, contracted by the U.S. Air Force.

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

Why have you never heard of the second most popular tourist site in New York?

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

The real faces of Venice beach captured on Romanesque columns.

The capital of the Cayman Islands is a center of offshore banking, but gets battered by blistering hurricanes.

Santa Monica's oldest restaurant, decorated with set pieces from the Mutiny on the Bounty.

The oldest working bell set in North America, the bells at Old North Church sat silent for their first four years in Massachusetts.

The world's longest known cave system.

Three hundred years of preserved Spanish colonial history in San Antonio.

Giant six-pack could provide one person a six-pack a day for 3,351 years.

One-time winter retreats of prolific inventor Thomas Edison and his friend Henry Ford.

Built in 1512, the oldest cathedral in the Americas.

A 60-room castle constructed by a horse-racing heir.

Seat of the Duke and Duchess of Devonshire for centuries.