Nicknamed the "Grand Canyon of the North," this open-pit mine in Minnesota has a much shorter history.

Terraced flowerbeds and rock sculptures in the midst of the Minnesota wilderness.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

The Boston square dedicated to the dark poet who was born nearby.

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

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

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

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

Dedicated to a colonial woman who was hanged for being a Quaker.

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

Dedicated to one of the darkest moments in Irish history.

A tiny plaque marks the location of the water source that facilitated the birth of modern-day Boston.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

Rhode Island's tallest building bears a resemblance to the "Daily Planet" building and has been empty for more than five years.

In the 19th century, this was the center of Boston's Black community.

No one messes with the Massachusetts sacred cod, not this time...

This statue intended for children to enjoy became a minor political spat.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

This bronze sculpture was inspired by a photograph of Martin Luther King Jr. and his wife embracing after he won the Nobel Peace Prize.

The site of Paul Revere's historic two lantern warning.

Narrowest house in Boston.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

The thousands of shades on display — some toxic, others impossibly rare — are a library of more than just color.