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.

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

This fully intact Neoclassical-Greek Revival style firehouse operated until 1938.

The oldest continuously occupied public building in the United States.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

A sparse, solitary sequoia still stands as a living tribute to the famous conservationist who planted it—but it's dying.

The California capital city once stood 10 feet lower than it does today.

A replica of the first public theater built in California.

These unusual houses look like giant boats that washed ashore on a residential street.

The oldest structure in a beachside California city was built to serve eight students.

What began as an illegal art installation has become a symbol for unity, ocean awareness, and coastline preservation.