Each summer 10,000+ descend on western PA for 17 days to create and be part of an elaborately built medieval city for the Pennsic War. There’s nothing else like it on earth.
A combination of Punic War and Pennsylvania, the Pennsic War is a 17-day reunion of the Society for Creative Anachronism (SCA) (yep, that’s the name) an international organization dedicated to researching and re-creating an authentic—and they mean authentic—pre-17th century European experience.
In other words, it’s a time portal to the Middle Ages.