Israel is home to a unique urban contrast: Jerusalem, the ancient spiritual center, and Tel Aviv, the modern technological and cultural hub. Tel Aviv is known as the 'White City' because it contains the world's largest collection of Bauhaus and International Style buildings (over 4,000), built by Jewish architects fleeing Europe in the 1930s. Jerusalem, meanwhile, is home to sites sacred to Judaism, Christianity, and Islam, including the Western Wall, the Church of the Holy Sepulchre, and the Dome of the Rock. Geographically, Israel is incredibly diverse; one can drive from the snowy peaks of Mount Hermon to the tropical coral reefs of the Red Sea in Eilat in a single day. The country is a global leader in desalination technology, producing much of its drinking water from the Mediterranean Sea to combat its naturally arid climate.