Probably the best car trip I ever went on was from Hampton, N.H. to the Finger Lakes in upstate New York, that I drove in my 58 Austin Healy 100-6 back in 1973, to my college roommates wedding. Mountain roads the whole way, if you stay off the interstates, some of the coolest curvy roads in the world, every other turn a hairpin- the stretch thru Vermont Route 9 is the absolute coolest. If I could, I would make the exact same trip in the exact same car. There is nothing like English sports cars for roads like that, and that car had serious nut. Second choice would be the road from Santa Fe New Mexico to the Carson National Forest that runs thru Los Alamos and the Jemez mountains, taking you right into the crater of the Jemez volcano, and after that to some of the most spectacular absolute wilderness in the country. I'd do that one in a '66 Chevelle with a 427.