MARATHONAS, Greece — Amid weird weather, war, and rising prices, Europe in the summer of 2023 is proving to be more popular than a fire sale at Filene’s Basement. (Remember those?) Hotels on the Continent are selling out and cheap airfares are elusive, but the tourist hordes keep coming. 

Yesterday’s battles, of course, furnish Instagram moments for the future. That is one thought, among many, that came to mind as I swerved my leased, somewhat automatic car into a parking lot 26 miles north of Athens — having been made to understand by a kind farmer I was driving in the wrong direction — and found myself staring at the Tumulus of the Marathon Warriors.