I do that a lot. It's one of the reasons I got into expediting.
I took a Time Out when I delivered in Key West. Sat dockside in an open air restaurant and dined on the largest scallops I've ever seen.
Delivered to Flagstaff and went out of service for a few days to tour the Grand Canyon. Went to Bryce Canyon (in many ways just as impressive as the Grand Canyon). Glen Canyon, Lake Powell, Monument Valley, all that.
Kalispell, MT, near Flathead Lake and Glacier National Park is one that I'll usually take an extra day or two. It's breathtaking any time of the year there.
There are lots of places that are beautiful, whether it's a foggy sunrise over Wabash, Indiana in June...
or a sunny November afternoon at Devil's Tower, Wyoming.