The red arrow in the above picture shows two sliding doors with full-size paintings attached. When closed, the doors combine into one large picture. If opened, they reveal a secret room behind.
Boris Dennler created these “Wooden Heaps” pieces that look like stacks of wood, but are actually functional furniture pieces with hidden compartments.
Ed Skoudis office includes this hidden space behind two secret bookshelf doors. The suit of armor is a nice touch to this classy, steam punk themed office.