When it opened in 2002, the es.hotel, as it was known then, was the first new-build hotel in central Rome for decades. Taken over by the Radisson group a couple of years later, it's lost little of its design edge, and the wishful-thinking prices have come down to more competitive levels. In most bedrooms, beds and shower units occupy the same wooden raft in the middle of the floor, and their tinted glass end walls make for a Mondrian-on-acid effect in the central courtyard. But the hotel's real X-factor is its 20-metre rooftop pool, open from mid-May to mid-September. There's also a smaller kids' pool, and a stylish rooftop bar/restaurant, Sette. The surrounding area, down the side of the city's main Termini train station, is not the most salubrious in the city, but it's generally pretty safe, and there's a certain frisson of contrast to be enjoyed in the view from one's poolside sun lounger of commuter trains coming and going below.