Time travel exists, and I’ve found the portal – it’s located right off Main Street in Hummelstown, Pennsylvania, disguised as the Soda Jerk Diner & Dairy Bar. The moment you pull into the parking lot, ...

But the specialty shakes are where Corvette Diner truly flexes its milkshake muscles. The Peanut Butter Cup creation tastes like someone liquefied heaven and served it with a straw—nutty, ...