My son-in-law and four classmates, while in college on summer vacation, went to every major league park (28) in 30 days. The year, 1995, I think. They traveled by automobile. The logistics of matching the geography with home games was a feat in and of itself. Their journey was picked up by ESPN and before they finished they were given VIP treatment at some parks as well as TV interviews.
My son-in-law has the 28 ticket stubs mounted in a nice frame with a map showing their route. A nice piece which is now hanging in his garage.

I actually liked him for awhile when I heard about the trip, but have since lost interest since the tickets were moved to the garage, which if he sees this is where I'll be sleeping when we visit.