Reservoir in the Sierra Nevada foothills about 45 minutes from Nevada City, California, and Lake Shasta in the mountains just outside Redding, California, are also popular spots for houseboats. Four rivers or "arms" merge to create this: the Sacramento, McCloud, Squaw Creek, and Pit. Shasta Dam, the highest center spillway dam in the world, can be found at the southwest corner of the lake. Lake Shasta Caverns, can only be reached from the lake. Houseboating is also common on Lake Cumberland - often referred to as the Houseboat Manufacturing Capital of the World (as the majority of American-built houseboats are manufactured in the counties surrounding Lake Cumberland). Lake Cumberland and other lakes in the Southeast US such as Norris Lake (TN), Dale Hollow Lake (KY/TN), Center Hill Lake (TN), Lake Lanier (GA) and more offer very favorable houseboating conditions as the geography provides a vast number of coves and fingers that allow houseboats to tie up or anchor away from the main channel and provides the user a peaceful, secluded atmosphere. Due to the large number of houseboat manufacturers located in the Southeast US, the new and used houseboat marketplace in the Southeast is one of the most competitive and affordable areas for houseboats to be purchased in the nation. Houseboat transporters can also deliver a houseboat to any body of water in the US. Houseboating is also popular on Lake Amistad, Trinity Lake, Lake Mohave and Lake Mead National Recreation Area. In New York, houseboats have also become a major part of the great South Bay on Long Island. Houseboats are also available for rental at Lake Billy Chinook in Central Oregon where waterskiing is popular. Lake Billy Chinook has many little coves to anchor the houseboat. Shanty boats Roughly built float houses are sometimes called shanty boats but may be built on a raft or hull. In historic logging operations workmen sometimes used an ark as mobile dwellings. Oceania Australia In Australia, especially on the Murray River (most notably the town of Mannum) and the sunny coastline of Queensland there are many motorized, pontoon-based houseboats with two or more bedrooms; some of these houseboats have more than one level or multiple stories (floors). Some are privately owned as either a primary residence or a holiday shack. Many are also available for hire (rent) as self-driven holiday destinations with accommodation for four to perhaps a dozen persons. Coomera River,