The line at the Sant' Eustachio Il Caffè is almost as long as the one at the Pantheon, but unlike the Pantheon on a summer afternoon, it moves fast. Stand at the bar for a quick espresso, or grab a table outside and linger for a bit with a monachella, a fancy drink that has layers of sweetened espresso, hot chocolate, and whipped cream. 

That seat is going to cost a little extra, but it comes with a view of a building painted with 16th-century Medici family fresco, a Borromini spire that looks like a swirl of soft serve, and politicians in expensive suits on a break from the nearby Senate. If you’re looking for wifi and a big salad for lunch, the same team has Emporio Sant’Eustachio, Rome’s more stylish answer to Starbucks, around the corner.