Yarkon Park, along the shores of the Yarkon River, is the largest park in Tel Aviv and serves the city's residents as well as those living in the surrounding Dan metropolitan area. Also known as Ganei Yehoshua, the park is a favorite spot for picnics and sports activities. Attempts are being made to ease the Yarkon's pollution, and boating on the river is frequently forbidden. Horticulturalists will love the park's cacti and tropical gardens, and bird lovers will enjoy the Tzapari Bird Park. The nearby Meimadyon Water Park offers a cool, refreshing escape from the summer heat. The Yarkon Park's amphitheater has hosted many large outdoor concerts featuring Israeli and international entertainers.