The hallucinogenic center of the ancient world.

Harry Houdini plunged into the Charles River and performed one of his escape acts here in 1908.

This impressive Boston holy house is the American mecca for Christian scientists.

An enormous, inside-out glass globe built in 1935.

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

Commemorating the 1948 creation of the Jimmy Fund, a Boston-based cancer charity.

This historic house was the birthplace and childhood home of the 35th president of the United States.

Marking the location of the secret headquarters for the Counterintelligence Corps in WWII.

The oldest playground in America.

The home of the founder of American landscape architecture puts his principles into practice.

Inside a grand Victorian-era carriage house is the oldest automobile collection in the United States.

For decades, this waterfall remained hidden because of an artificial dam.

The world's first aircraft factory has been hiding inside an automobile plant for almost 80 years.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

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

Giant trolls run this farm!

Inside houses a vast collection of military aircraft and missiles spanning the ages.

This stuffed pigeon of war had the very serious name "John Silver" until he lost a leg in battle.