Have mercy!

On Friday, John Stamos took a trip down memory lane to visit the home where Full House was set — and went completely unnoticed by fans!

"Boy, these youngsters have 0.0 idea what they're missing. #Fullhousehouse. #TURNAROUND," he captioned the photo of him standing beside several tourists similarly checking out the TV home.

john stamos

Want to know what the rest of the 'Full House' crew has been up to since the hit show went off the air in 1995?

Click through the gallery below to see Danny, Joey, D.J., Stephanie and the rest of the cast then and now!