I've been asked the Dracula questions recently, so I'll post a few pictures I took in January and I will write a few things about Dracula and his castle. :)
Bram Stoker used Bran Castle as his model for Dracula's Castle. This was featured in multiple film adaptations of Dracula, and has informally become known as Dracula's Castle.
The Count Dracula character was supposedly based in part on the real-life Vlad the Impaler. But Vlad's castle was the one at Poienari in Wallachia, not in Transylvania.
Sorry to disappoint you, but Dracula's Castle (in Stoker's novel) is not the real Dracula's Castle!
He he, I promise I will disappoint you even more in the next few days, as I'll write more...