Halloween has come a long way since the Celts celebrated the date as a transition from summer to winter. This year, don’t limit yourself to dressing up in a tacky costume, carving a wonky smile onto a pumpkin, and answering the door to a plague of irritating trick or treaters – head to some truly spooky dwellings, wild street parties or ghoulish haunts around the world instead. Here’s HI’s guide to the eeriest, and coolest, places to be seen this Halloween.