A plaque memorializes the Boston location of one of the largest nightclub fires in history.

America’s oldest community theater, this Boston club has been in operation since 1877.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

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

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

A beautiful Victorian-era cemetery, complete with a miniature village.

A small poultry graveyard in the courtyard of a popular Key West watering hole.

A museum dedicated to the alleged Roswell Incident.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

A burnt-out motel with priceless Native American artwork in the basement, redeveloped into apartments.

The first declared National Monument in the United States.

An acoustic anomaly with a mysterious cause sits in the heart of Tulsa.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

Two thousand artifacts from around the world collected by one woman who loved to travel.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

This Dutch-styled residential building was originally a cocoa company's World's Fair showpiece.

Radical Bookstore and Community Space.

The 1920s child prodigy author was last seen here at her Brookline home before vanishing at age 25.

The oldest playground in America.

This supermarket is suspended 25 feet above an interstate highway.

On a side street near the interstate is the building where the famous anarchist once owned an ice cream parlor.

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