The entrance looked inconspicuous, but Potter said it would. Two dragon gargoyles guarded it, creating a faint barrier that would stop any Muggle from even thinking of entering the place, even though it did nothing to deter a wizard. Draco put the key inside the rusty keyhole and turned it. He had to push the door with his arm for it to open, and when it finally relented, they were enveloped in darkness and dust.