For my last day in the U.K., I took yet another trip with London Walks out to see Stonehenge. It’s as awesome and weird as you think it is. You should go see it sometime.
Salisbury was part of the trip as well, but sort of an add-on in my opinion. It’s probably part of the tour because that’s where the train station is. Anyhow, the town is very charming and has England’s tallest cathedral: