Explain one characteristic of a Gothic setting present in The Strange Case of Dr. Jekyll and Mr. Hyde.

Although
the streets of London and Soho where Mr. Hyde pursues his evil business recall the dark and
seedy strains of the Gothic, the primary Gothic setting in the story must be Dr. Jekyll's
laboratory building. A Gothic setting is often an old, decaying edifice, perhaps empty except
for the supernatural creatures that haunt it, or a secret, forbidden wing or room in an occupied
building. Jekyll's laboratory is a separate wing or building from his main home, and it is
accessed through a courtyard. Stevenson foreshadows the final scene of the story when Utterson
and Enfield, on their "usual walk," take the "back way to Dr. Jekyll's."
There, standing in the "premature twilight" of the courtyard, they see Dr. Jekyll in
an upper window. After a short, depressing conversation with him, they see his face change to an
"expression of ... abject terror," and he slams the window down. 

Later, when Poole comes to get Utterson, they make their way into the laboratory building. Its
surgical theater...