Nightmare Realm Scary Maze in Eltham: Two Shows, One Night

If you have been searching for a scary maze near me in south-east London this October, the one worth crossing the city for sits behind the Gatehouse to Avery Hill on Bexley Road, London SE9 2PQ. The Nightmare Realm, an Irish horror production, has taken over the empty Victorian Avery Hill Mansion in Eltham for its first run outside Ireland, with more than 70 live actors spread across two walk-through stories and a small village in between.

The Nightmare Realm was founded by Karl and Sylvia O'Connor and began in Tralee in 2009, later moving its October seasons to Cork and then Dublin, where Time Out describes it as having scared the city since 2009. The 2026 London season is billed as A Nightmare From Overseas, and Greenwich Wire reported it as the production's first outing outside Ireland. That framing runs through both stories: each one is about something that crossed the Irish Sea and found a new home in south-east London.

The building matters as much as the cast. Avery Hill Mansion belongs to the University of Greenwich and, according to Greenwich Wire, served as a teacher training college before becoming part of Thames Polytechnic in the 1980s. It has stood empty since 2020, when a planned boys' secondary school on the site was cancelled. Walking up to the pale stone frontage after dark, with the lawns of Avery Hill Park falling away behind you, is a stronger opening scene than any purpose-built shed on an industrial estate.

Avery Hill Asylum is the more clinical of the two stories. The official site introduces Dr Thorne, a doctor who has carried decades of research across the Irish Sea to a forgotten asylum where no question is too dangerous, and Time Out sums it up as a Victorian mental institution in which Dr Thorne has been conducting disturbing experiments. Expect cramped corridors, examination rooms and staff who treat your group as the next batch of patients rather than visitors.

Sundown Manor swaps medicine for folklore. Its plot follows an ancient Irish bloodline that has arrived in London looking for fresh victims, so the scares lean on family portraits, candlelit rooms and characters who talk to you before they chase you. Greenwich Wire notes that the production relies on practical illusions and special effects rather than screens, which is why the rooms feel physical: doors that should not open, floors that are not quite level, and actors who appear from places you just walked past.

Between the two mazes sits Halloween Town, which Time Out calls a living village with intriguing characters, hidden rooms and a slightly more chilled-out vibe, plus snacks. Treat it as the half-time interval. The official site also mentions five secret immersive experiences tucked around the grounds, so it pays to wander the village rather than heading straight for the exit once both main stories are done.

Entry runs in staggered timed slots through each evening, and the whole visit takes about two hours, with roughly 75 minutes of that inside the two stories. Book through the official site rather than turning up, because each slot sends a small group through at a time and the season is short: 18 nights between 9 October and 1 November. Weekend dates in the final Halloween week are the ones to grab first.

The guidance published for the season recommends the show for guests aged 13 and over, and anyone under 16 has to be accompanied by an adult aged 18 or over. If your group includes a nervous first-timer, put them in the middle of the line rather than at the front or the back; in walk-through mazes the actors tend to single out whoever leads and whoever trails. Wear flat shoes you can move quickly in, since the mansion grounds are uneven and dark between buildings.

A practical rhythm that works well: arrive fifteen minutes before your slot, do whichever story your group fears most first while adrenaline is high, recover in Halloween Town with a snack, then finish with the second story. Leave bags in the car if you drove, because you will be ducking through doorways and being herded through tight rooms where a backpack only slows the group down.

The official site lists free on-site parking, which makes driving the simplest option from outer London and Kent. Without a car, take Southeastern trains to New Eltham, about a 15-minute walk, or Falconwood, about 20 minutes on foot. From the Jubilee line, ride to North Greenwich and pick up the 132 bus, which stops a two to five minute walk from the gate. Other buses serving the area include the 162, 286 and B15, plus the N21 night bus for the ride home.

If you arrive in daylight, Avery Hill Park itself is worth half an hour: the Winter Garden glasshouse attached to the mansion is a Victorian conservatory, though it is fenced off from the event. Eltham High Street, a short bus ride west, has pubs and restaurants for a pre-show meal. Further on, Eltham Palace, the English Heritage site with its Art Deco interiors and medieval great hall, makes a good daytime pairing for visitors staying in the area over a weekend.

Address: The Gatehouse to Avery Hill, Bexley Road, London SE9 2PQ. Season: 18 nights from 9 October to 1 November 2026, with staggered timed entry each evening. Visit length: about two hours, including around 75 minutes inside Avery Hill Asylum and Sundown Manor. Age guidance: 13 and over, with under-16s accompanied by an adult aged 18 or over. Parking: free on site. Nearest stations: New Eltham and Falconwood on Southeastern. Booking: online through thenightmarerealm.com.

Before you go, ask Karpo in the Karpo APP for a pre-show dinner spot on Eltham High Street or a late bus route back across the river, and it will sort the evening around your slot.