UPDATED: Six Flags Discovery Kingdom, Vallejo California, Present Day: 2024

In Redwood City CA In 1968 And Reopening in Vallejo CA In 1986 Marine World Opened From A Zoo To A Zoo Hybrid Theme Park, Into Six Flags Discovery Kingdom In 2007. Packed With A Total Of 39 To 40 Different Rides And Attractions, Including 10 Rollercoasters, Multiple Different Flat Rides, And 3 Water Rides, Enjoy Your Ride At Six Flags Discovery Kingdom.