When I was 21, myself and a good college buddy mapped out a route that would carry us to all current baseball stadiums (28 at the time). We drove an old Toyota Celica hatchback 8,200+ miles and made the journey in 31 days. Luckily no rain outs. Started in South Florida. Up the east coast, across the top of the US. Seattle, down through California and back east. Finished in Houston. Fun times.