It has been questioned why Walt Disney built the castle relatively small (it only rises 75 feet above the moat), but he actually had a very good reason. He recalled that the tyrants of Europe built huge, imposing castles in order to intimidate the peasants. Disney wanted his castle to be friendly, so it was built on a smaller scale.

When you are walking through the castle away from the statue, and you pass under the Disney Family Seal and you walk a few more steps until you're almost out of the castle, look down and there's a gold spike (survey marker) in the ground.
(Some Information courtesy of "Miss Shields")

In 1956 the phone extension for Sleeping Beauty Castle was 386

From Steve Birnbaum brings you the best of Disneyland 1982:
Rising above the treetops at the end of Main Street, it seems like something you've just imagined, especially on nights the park is open late, when fireworks explode about the battlements like so much of Tinker Bell's pixie dust. Closer inspection, however, shows the building to be real enough. A composite of various medieval European castles, primarily in the French and Bavarian styles, Sleeping Beauty Castle is constructed of concrete with towers that rise to a height of some 77 feet above the moat. And the whole thing looks even larger because of the use of forced perspective. In a real castle, blocks of stone near the top appear smaller than those at the bottom simply because they really are farther away. By artificially decreasing the dimensions of Sleeping Beauty Castle's uppermost blocks, the structure is made to appear much taller. The drawbridge functions just like a real one, too, although it has been in its present position ever since the park opened in 1955. Inside the castle, a rather sweet series of dioramas, not unlike the Emporium shop windows, tells the story of the beautiful princess Aurora; three bright-eyed fairies named Fauna, Flora, and Merryweather; the magnificently evil Queen Maleficent; a finger pierced by a spindle; a long sleep; a handsome prince; true love's first kiss; and one of the best loved of fairytale- dom's happily-ever-afters-all to the tuneful accompaniment of Tchaikovsky's music for the Sleeping Beauty ballet. The swans that inhabit the moat surrounding the castle are as real as most people think they look; they're leased from a local firm and replaced as they get older (and meaner). The vegetation around the water's edge is juniper-planted there because it's one of the few green plants that the big birds will not eat. The two graceful trees to the right of the drawbridge (on the way into Fantasyland) are not weeping willow, as you might first guess, but willow leaf pittosporum (Pittosporum phillyraeoides), which bear hundreds of tiny yellow flowers in spring, and melaleuca (Melaleuca nesophila), purpled with fragile lavender flowers for several weeks in early summer.