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

A monumental statue of RCA's mascot now sits atop a historical society roof after a life of moving around.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

Home to items never before seen by the public.

The first patented shaved-ice machine heralded a snowy wonderland of iced treats at a favorite New Orleans summer shack.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

Frank Lloyd Wright built this suburban synagogue late in life, but it stands among his most iconic masterpieces.

An outlandish shoe shaped house built by an eccentric millionaire.

A failed piece of Orientalism has become the proud symbol of a community.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

A toxic ghost town sitting atop a massive coal fire.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

World's first "penitentiary," meant to be humane, drove men insane.

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

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

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

An eerie, decaying ghost town destined to fade into the forest.

The man who first patented the Ouija board rests in peace beneath a headstone that playfully reflects that achievement.

A museum dedicated to exhibiting remarkable outsider art.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

The trials and tribulations of marking Poe's grave.

This free, take-a-book shop seems like a trick but isn't.

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.