Just moved into a house that was built in the 70s. The previous owners custom built it, and the architect was the man's old frat buddy. Custom stuff everywhere (trash chute straight from the kitchen into the garage wheelie bin!).
When we first looked at the house, we really loved it, but there was no office space that my husband could use for his music stuff. It was the only disappointing thing about the house, but since everything else was so perfect, we went ahead and put in the offer.
When we were doing another walkthrough with our parents, we showed them the walk up attic, which is pretty cool too. When I turned around to leave, I noticed a wall of insulation that looked....different. if you push the insulation to one side, a doorknob appears. And behind it is the secret office.
Coolest house ever.