The Exposition Park Rose Garden is a historic 7-acre sunken garden in Los Angeles. Known as "one of the city's best-kept secrets," the garden is celebrated for its vast collection of over 20,000 rose bushes. Originally part of the city's Agricultural Park, the garden was established in 1927 and features four marble statues by Thyra Boldsen, a central fountain, and several gazebos. The garden, which was once threatened by development plans, was added to the National Register of Historic Places in 1991 to ensure its preservation. It also is a popular filming location and attraction adjacent to the University of Southern California, the Natural History Museum, and the California Science Center.