Hollywood Secrets: The Hollywood sign

Welcome to Hollywood Secrets -- a weekly video series uncovering Hollywood's best-kept secrets. Check back for new episodes every Tuesday!

The Hollywood sign is probably the most famous sign in the world.

Originally conceived in 1923 as a temporary advertisement for a real estate project in the Hollywood Hills, the 45-foot-tall sign has become synonymous with show business and has been featured in countless films and television series.

The sign has its own share of history, including a massive renovation project spearheaded by Hugh Hefner in 1978. Come along as we take you through the secrets of the sign in the video above!

For details on how you can visit the Hollywood sign, click here.