Perth, the capital of Western Australia, follows the Swan River from the port of Fremantle to its source in the Darling Range. Sunny and clean, Perth is considered among the most livable cities in the world. Its cityscape varies from Art Deco gems, to the Tudor-inspired London Court. The Swan Bell Tower provides a bird's-eye view of the whole metropolis. The Art Gallery of Western Australia describes the development of the state through art. Inside the Royal Mint is the largest gold coin ever made. Perth's coastline, with pristine sand beaches, is popular among visitors. Others head straight for the boutique wineries of the Swan Valley. Kings Park is where Perth's first explorers discovered a natural spring. The Botanic Gardens brim with remarkable plant species. Rottnest Island or "Rotto" has long been the favorite weekend getaway for Perth's city dwellers. Cottlesloe Beach is on the city's doorstep, and renowned for its excellent surf. Hillary's Boat Harbour and the Sorrento Quay boardwalk are ideal for a sunset stroll.