This was the first freeway west of the Mississippi River and is the only designated scenic byway in a metropolitan area. Upon its completion in 1940, it was designated an alignment of Route 66. As you travel the route, pay particular attention to the many bridges under which the Parkway passes, including the graceful 750-foot long steel historic Santa Fe’s Arroyo Seco Railroad Bridge (now the Metro Gold line) that spans across the entire Arroyo Seco and passes 100 feet overhead. Most of these bridges maintain their historic integrity, and their varied construction styles present a very different design aesthetic than more contemporary freeway architecture. This is even more the case for the four Figueroa Street tunnels that carry northbound traffic through Elysian Park. The Art Deco design of the tunnels are unique. There is a gateway sign welcoming a northbound traveler to South Pasadena constructed of arroyo stones taken from the watercourse.