There’s a jaw-dropping stone castle hiding in plain sight in Glenside, just outside Philadelphia, and it’s not a theme park or movie set—it’s the real deal. Grey Towers Castle, now the centerpiece of Arcadia University, looks like it belongs in a European fairytale, complete with turrets, stained glass, and grand halls. Locals drive by every day without realizing they’re passing a true Gilded Age masterpiece. Imagine studying for finals in a room where nobility once dined! Have you ever visited or even noticed this castle? What other hidden gems are tucked away in our neighborhoods? #Travel #Philadelphia #HiddenGems