Well, it was for work, but the trips were interesting. I drove to conventions all around the country (from my starting point in Kansas): LA, San Jose, Denver, Dallas, Austin, Cedar Rapids, Chicago, Cincinnati, Cleveland, Atlanta, Raleigh, Washington D.C., Baltimore, and Boston. Sometimes the same city multiple times a year. I think I racked up over 100k miles in 4 years.
I was with the same friend / co-worker for most of these trips, and we'd often wander out of our way to see the sights (unbeknownst to our employer

). We saw the Grand Canyon, the Sequoia National Park, Niagara Falls, and lots of others. I don't miss the conventions all that much, but I do miss the trips.