The movie title is a real-life location: Infiesto is a small mining town belonging to the municipality of Piloña, in the Principality of Asturias (north-west to Spain). Infiesto is distant about 39 km (24 mi) east to Asturias' capital Oviedo, having a population about 2,400 inhabitants according to census of 2021.
The English translation of Infiesto is "haunted".