Lake Merritt is a large tidal lagoon in the center of Oakland, California, just east of Downtown. It is surrounded by parkland and city neighborhoods. It is historically significant as the United States' first official wildlife refuge, designated in 1870, and has been listed as a National Historic Landmark since 1963, and on the National Register of Historic Places since 1966. The lake features grassy shores, several artificial islands intended as bird refuges and an interpretive center called the Rotary Nature Center at Lakeside Park. It has a boating center where sailboats, canoes and rowboats can be rented and classes are held. There is a fairy-tale themed amusement park called Children's Fairyland. The Gardens at Lake Merritt is also inside Lakeside Park. It is a 7.5 acre garden which contains seven themed gardens as well as community garden plots for growing food. The Gardens host the Autumn Lights Festival annually in late October, bringing over 100 artists to the garden with fabulous illuminated and digital art. A popular walking and jogging path runs along its Lake perimeter. The circumference of the lake is 3.4 miles and its area is 155 acres.