Serrella is at Carrer Pagre 7. Tap "Get directions" on this page to open the location in Google Maps and see the route from wherever you are.
Yes, Serrella's official website is www.barcelo.com/es-es/barcelo-la-nucia-hills/gastronomia/restaurante-buffet-serrella/?utm_source=bing&utm_medium=organic&utm_campaign=bing_places&utm_content=33126rS. You'll find the direct link in the "Website" section of this listing.
On this listing you can see "Other hotels nearby" right below, sorted by proximity. You can also open the full hotels page for the complete map ranked by distance from your location.