For some reason

I haven't seen these films, but if they are legitimate adaptations of The Hound of the Baskervilles, the term 'monster' hardly applies. The novel, at any rate, contains no supernatural beings. To be precise (spoiler for novel, rot13), va gur fgbel gurer vf n snzvyl yrtraq nzbat gur Onfxreivyyrf nobhg n tvnag tubfgyl ubhaq, naq n zna jnagvat gb zheqre gur urnq bs gur snzvyl gnxrf nqinagntr bs guvf. Ur bognvaf n ynetr naq ivpvbhf qbt naq cnvagf vg jvgu cubfcuberfprag cnvag fb vg jvyy *ybbx* fhcreangheny, naq gur ryqreyl ivpgvz qvrf bs sevtug.
No, that was question 10. I answered Lyon on this one.
Westminster is officially a city, and a correct answer under the terms of the question. I decided to go for something less obvious.