Once America's tallest structure, now a Baltimore landmark.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

The trials and tribulations of marking Poe’s grave.

A crumbling hospital from the 1850s on Roosevelt Island.

Volunteer-run library dedicated to exploring five decades of activism history.

A terrific purveyor of natural history objects and curios.

This 1960s kinetic artwork has been restored and is once again whirling away in downtown Minneapolis.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

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

The infamous Boston Mob ran rackets from an office here in the 1970s.

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.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This nearly 200-year-old restaurant's history includes an exiled French prince, JFK, and a very hungry Daniel Webster.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.