 Well, people started with skinny dipping, then underwear, but they started to wear, I guess, swimsuits designed for the beach. When vacations became a thing in the early 1800s, when more railroads were around, it was easier for tourists to vacation at the beach. Now, men would wear legging-type outfits, but the women started out wearing these long skirts and even wore them in what they called these bathing machines, which were basically carts on four wheels, and ladies could go in water with, I guess, privacy. Sounds pretty brutal.