This small glass cube is a peaceful out-of-the-way sanctuary at the busy airport.

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

Civil War-era Fort designed to withstand invasion and attack, with tricky traps called "murder holes."

This unassuming Massachusetts residence was built with a trap door to hide escapees on the Underground Railroad.

Hut with supplies for shipwreck survivors.

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

This giant Boston statue of Mary is standing on a globe to show her power over the universe.

This unassuming stone commemorates a condiment factory gone up in smoke.

This hidden labyrinth offers walkers some brief peace of mind.

Welcome sign announcing Haverhill, MA, as the birthplace of horror rocker/artist/director Rob Zombie.

A more than 260-year-old crypt built on Boston's oldest English burial ground.

A tiny monument to the classic American candy.

A unique columnar residence built in the 19th century.

A careful eye can find hundreds of dinosaur tracks running along the Connecticut River.

One man’s hobby is another man’s world of metal wonders.

Bouncing, delightful, mechanical art at the MIT Museum.

This railroad tunnel was once the longest in Massachusetts.

A coastal rock outcrop with mysterious inscriptions variously attributed to Native Americans, Portuguese, Phoenicians, Norse, and more.

Overgrown ruins of a turn of the century island fort that sees very few visitors.

Massachusetts memorial to murder victim Elizabeth Short near the spot where she was born.

Resonating tubes make music from highway overpass.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

Located just behind a quiet residential neighborhood, this is ground zero for the Salem witchcraft hysteria of 1692.

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