A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

This cemetery served as the only official burial grounds in Cambridge for nearly 200 years.

This plaque is dedicated to one-half of the Magliozzi brothers and their hit radio show, 'Car Talk.'

This plaque commemorates the birthplace of the longest-ruling Thai monarch and the third longest of any sovereign state

A Harvard-area eatery preserves the uncovered tiles of its century-old predecessor.

One of the last remaining movie theatres in the country that features a rear-projection system.

Memorial to a beloved puppeteer as well as all street performers.

A Rocky Mountain city provides a happy ending for a pinto pony and his Brobdingnagian red chair.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

A giant time capsule not scheduled to be cored until 2040.

This family-run roadside motel is an ode to the mid-century motor era.

This university transit system is a 1970s vision of the future.

Once the home of a noted Civil War spy, the two-story brick house now serves as a museum.

A tribute to the forgotten origins of American religious freedom.

A merry-go-round that became a rallying point for the early Civil Rights Movement.

The development and impact of electronic media showcased in a picturesque farmhouse in Maryland.

A lawn full of retired spacecraft on display at one of NASA's first research labs.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

This Art Deco masterpiece has stood in for some of the most famous buildings in comic book history.

An ideal location for plane spotting in British Columbia.

The colorful, smiling concrete silos of Vancouver.

This scenic waterfront swimming pool is the longest salt water pool in North America.

A psychedelic labyrinth on the San Francisco bay.

This folk art dinosaur was almost pushed to extinction due to lack of a building permit.