"Rome’s cobbled streets and sweltering sun might seem like a hindrance to running but head out early in the morning and you’ll reap all the picturesque rewards that the city has to offer. Group running tours from a number of outfits kick off when the weather’s still cool and the tourists are asleep. These routes afford a plethora of unimpeded sights, such as Castel Sant’Angelo and the Colosseum. If you’re heading out alone, start at the crack of dawn and dart over to the Roman Forum – a singular spectacle at that hour."