The first Disneyland in Anaheim, California opened its gates almost 60 years ago, on July 17, 1955. As part of an upcoming anniversary celebration Disney released raw, time-lapsed footage of the construction that happened under the direct supervision of Walt Disney himself.
You can get a glimpse of the process — captured by some really high-end cameras of that era, scattered throughout the site — of how the Main Street, Tomorrowland or Sleeping Beauty's Castle were built between 1954 and 1955.
There's more here. Different parts of the archive footage with commentary.