The Aquincum Hotel Budapest Budapest, Hungary

About the Hotel: Overlooking the Danube River, this refined, contemporary spa hotel is a 4-minute walk from the Szentlélek tér subway station and 8 km from Buda Castle. Featuring warm decor, the polished, understated rooms come with flat-screen TVs, minibars and tea and coffeemakers, as well as free Wi-Fi. Room service is available, and upgraded rooms add river views. Club rooms offer VIP lounge access, while suites add separate living rooms. A breakfast buffet is free. There's a posh restaurant, a sleek bar and a thermal spa with pools, saunas and whirlpools. Other amenities include a fitness room, a business center and 14 event rooms.