An eccentric inventor's castle home with its own indoor weather system.

The macabre graffiti spectacle in a quarry in a Massachusetts forest reservation.

A cave dug by a man directed by ghosts to find pirate treasure.

At the supposed instruction of Ben Franklin and Socrates, a Spiritualist believer intended to birth a mechanical messiah here.

This Gothic castle was inspired by Erik the Red's Viking residence at Brattahlid in Greenland.

Ornate and macabre headstone in one of the country's oldest cemeteries.

The lecture hall where Alexander Graham Bell first demonstrated the long-distance phone call.

At this former Prohibition speakeasy, electric birds signaled the arrival of hooch.

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

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

This simple convenience store sits on the location where the Ouija board was named—and has a plaque to prove it.

A sewing machine tycoon built this miniature castle for the people and to beautify a lakeshore.

A gigantic 10-foot tall stone man.

Resonating tubes make music from highway overpass.

This relic of 19th-century infrastructure is one of the few remaining coal gas storage tanks in the U.S.

The largest museum dedicated to Italian Americans on the East Coast is located in a 100-year-old church.

The mansion home of author Edith Wharton.

Wander the sprawling living museum on the site of one of a 16th-century community.

Take a step inside the picturesque studio of America’s most renowned sculptor.

Eight whimsical acres of metal art.

Three acres of mythology-inspired sculptures are visible from the highway.

Two mermen, eternally spitting into each other's mouths.

Thousands of bottles that have held everything from poison to perfume make up the collection of this small museum.

A beautiful multicolored mound formed by the mineral deposits of the Orenda Spring.