Gothic Romances are commonly characterized by their use of the following elements: mystery, supernatural events or occurrences, dark, gloomy settings like castles or large estates, a dark, mysterious hero figure. Wuthering Heights features most of these characteristics.
Mystery: Heathcliff is certainly a mysterious element in the novel. His heritage is unknown; the only supporting detail or clue is that he spoke some foreign language when he was found on the streets of London. Heathcliff's fortune also is a mystery to the reader--he left dirt poor and came back filthy rich, ready to torment his enemies.
Supernatural events: Catherine's ghost searches the moors, trying to find her way back to Wuthering Heights.
Setting: Wuthering Heights is depicted as a dark, gloomy estate, set upon the wild moors of Scotland.
Romance: Wuthering Heights has a passionate romantic triangle formed between Heathcliff, Lindly, and Catherine. "Be with me always--take any form--drive me mad! only do not leave me in this abyss, where I cannot find you!" Wuthering Heights exudes passion and unrequited love.