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

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

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

Beautiful steampunk ghosts of early Massachusetts.

The oldest playground in America.

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

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

An anonymous art project beneath Longfellow Bridge where hundreds of trophies line the steel support beams.

Her final resting place was intended to be modest and private, but the power of her popularity continues to draw visitors.

A bomb shelter and some fireplaces are all that remain of the house Fred Roberts tried so hard to keep standing.

The stone walls of a home built to withstand a California wildfire still stand after more than a century.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

A house built from trash known as the poor man's Hearst Castle.

The unbelievably opulent home built for an infamous newspaperman.

This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

A famous alternative culture epicenter and where Joplin serenaded young hippies.

A brooding mansion of clinker brick stands out among the Victorian houses of Pacific Heights.

This turn of the century masterpiece has a mysterious goaty interloper.

This sailor's boneyard was lost under a parking lot for decades before being rediscovered.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

San Francisco's newly reopened hands-on science museum.

San Francisco’s condensed garden of incredible plant growth.

The stones that traveled from Spain to eventually become a holy place for San Francisco's nature worshippers.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.