This year marks the 100th anniversary of the Hollywood Sign. It’s been at the center of scandals, PR stunts, and more during its time perched up on Mount Lee.

In 1978, the Hollywood Sign was in a sad state, so rock legend Alice Cooper spent $27,000 to buy an “O” to honor his friend Groucho Marx. Other celebs followed.

Artist Zach Fernandez marked California’s marijuana legalization by turning the Hollywood Sign into “Hollyweed.” It was tough to pull off due to security around the sign.