World's smallest skyscraper, the product of a remarkable con.

First LEED-certified gas station in the United States.

Garden dedicated to native carnivorous plants and site of huge flytrap heist.

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

A dedication plaque on this Boston tunnel is a microcosm of a massive, controversy-laden construction project.

These whimsical works of art tell the story of the city's past and present.

An ancient cemetery with some historic bodies underfoot.

You can spend the night as an honorary lighthouse keeper in this quaint, historic beacon.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

Mysterious stone tower featured in many alternative histories of the New World.

Dedicated to the explorer who opened Japan to the West.

The home of the artist credited with introducing the tomato to the American diet.

An ode to Japanese artist Hokusai, with a bit of a comical twist.

A single light illuminates one man's overshadowed contributions to street lamp history.

Designed to not only to represent the history of the local community but also, the future.

A real plaque marks the spot where a Faulknerian character committed fictional suicide.

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

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.

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

The final resting place of a suffragist author.

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

There is an unmarked red button hidden over Houston's Buffalo Bayou that is just begging to pushed...

Once seen as a bit of an eyesore, this sculpture has become a staple of downtown Houston.

A 90-year-old underground water reservoir offers a more industrial kind of tranquility.