A beacon atop a downtown building provides Bostonians with weather forecasts and baseball news.

Painstakingly built dioramas sit unnoticed in a Boston office building.

America's original house of worship for Spiritualism, the religious movement based on communing with the dead.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

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

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

In 1958, an MIT fraternity pledge laid down on this bridge and instituted a new, unique unit of measurement.

This hotel was the site of major events in sports and radio history. It was also used as a detention center during World War II.

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.

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

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

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

Radical Bookstore and Community Space.

From bench to vandalism to art, this silly prank seat was funny enough to become permanent.

The oldest playground in America.

Final resting place of the author who wrote the ghost story "The Turn of the Screw," and his brother, the Harvard doctor and paranormal investigator.

The final resting place of a suffragist author.

This peaceful Massachusetts graveyard was one of the first "garden-style" cemeteries in America.

This is the house that spite built.

A small plaque promises cold, hard cash in exchange for work by the famous pop artist.

One of America's most historic homes also holds a startling literary legacy.

The strikingly modern structure stands out among the brick buildings speckling the Harvard Business School's campus.