Danubius Hotel Gellért is an art nouveau hotel on the western (Buda) side of the city, right by the River Danube and just below the city's famous Géllert Hill, formerly a prime vinicultural area. It first opened its doors in 1918 and quickly became one of the city’s most popular places to stay, attracting all sorts of royalty from around the world along with its fair share of U.S. presidents. Today, the hotel's star attraction is the Géllert Spa, an elegant complex that offers multiple hot spring baths of various temperatures along with steam rooms, saunas, and even an outdoor wave pool dating to 1927. The 234 rooms here are large and elegant, with classical furnishings that meld well with the 100-year-old property's vibe, and some of the suites have lovely river views. However, in terms of decor, it’s the common areas that really stand out, particularly the huge green, yellow, and blue stained-glass pictorial windows that look out over an elegant staircase, complete with a wrought-iron banister.