USA road trip. I've done the bum it round the far east and thats OK, but the states is awesome IMO. People are so friendly no language barrier
My best ever holiday was starting in New York and then flew to Denver and drove for 3 weeks though the rockies, Skied one day in Breckenridge, mtb the next day in Moab in the desert heat. Then up to Arches national park, Vegas, Yosimite, San Francisco etc etc.
We did a similar thing 2 years in a row, cost us a bomb but loved it