Grotesque is a word commonly known as something that could mean odd, distorted, ugly or repulsive.
At the same time though, it could also mean bizarre or so shocking and horrible it could be fantastic.
And though rarely thought of this was in English language, it could mean both beautiful and ugly at the same time.
(From the Urban Dictionary)
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Grottesco - 1 (agg. e sm. agg.) Di ciò che è ridicolo per stranezza. ~ paradossale <> • es. "Avevano assistito a uno spettacolo grottesco."
Sinonimi: bizzarro, brutto, deforme, mostruoso, ridicolo, strano