The Giant Dipper is a historic wooden roller coaster located at the Santa Cruz Beach Boardwalk, an amusement park in Santa Cruz, California. It took 47 days to build at a cost of $50,000. It opened on May 17, 1924 and replaced the Thompson's Scenic Railway. 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. As of 2012, over 60 million people have ridden the Giant Dipper since its opening.