The Giant Dipper is a historic wooden roller coaster located at the Santa Cruz Beach Boardwalk, an amusement park in Santa Cruz, California. The Giant Dipper, which replaced the Thompson's Scenic Railway, took 47 days to build and opened on May 17, 1924 at a cost of $50,000. With a height of 70 feet (21 m) and a speed of 55 miles per hour (89 km/h), it is one of the most popular wooden roller coasters in the world.