Thousands attended Europe's largest Halloween festival in Londonderry, featuring a parade and fireworks. Over 100,000 visitors from around the world contributed to the local economy, with high hotel occupancy and thriving bars and restaurants. The festival, running for 39 years, included highlights like the Awakening the Walled City Trail and unique performances. Despite weather challenges, the event celebrated community creativity and the spirit of Halloween, rooted in ancient Celtic traditions.