You might not immediately associate roller coasters with racial equality, but more than three years before Dr. Martin Luther King, Jr.’s March on Washington, Maryland’s Glen Echo Park was a focal point of the Civil Rights Movement. It made sense: since its opening in 1899, Glen Echo had been the premier amusement park for white Washingtonians. The park featured a number of modern roller coasters, a miniature railway, a Ferris wheel, an amphitheater, a pool: everything and more that other parks provided.