While the impressive Hilton is one of the city's venerable architectural landmarks, it's also been kept up to date with modern, clean-lined, and minimalist design. The once-traditional lobby is a vast expanse of white marble punctuated by sleek, mod benches. Guest rooms are fitted out in light wood, brushed metal, etched glass, and crisp white duvets. Facilities are business-oriented, with a stylish executive check-in lounge and huge conference rooms. Along with a gym and a spa, the hotel has the biggest hotel pool in Athens (open from May to October only). It also boasts a branch of Milos Restaurant, Manhattan's luxe Greek eatery and the Galaxy rooftop bar, which despite its high prices remains a favorite with hip Athenians.