Hero Xtreme: Go Below Underground Adventures

Go Below Underground Adventures: North Wales
Available until 5 June 2026

Save up to 5% discount with promo code DAYSOUT

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Step into the depths of Snowdonia with Go Below Underground Adventures in North Wales

Step into the world beneath the mountains with Go Below Underground Adventures, your go-to for underground caving in Wales! Featuring activities for first-time explorers and caving connoisseurs, head to the heart of Snowdonia and swap your everyday for the extraordinary. 

Go Below Underground Adventures: Hero Xtreme Course

Designed for those who crave serious adventure and adrenaline, explore the largest and deepest slate mine in the world with a team of professionals. 

  • Age Restrictions: 14+
  • Duration: Approx. 6 hours
  • Difficulty: Tough
  • Abseils: 1-2
  • Ziplines: 2-4
  • Traverses: 10
  • Ladders: 1
  • Bridges: 2
  • Goliath Zip: No
  • Boat Section: No
  • Freefall Jump: No
  • Meeting Point: Tanygrisiau station (Ffestiniog Railway), Tanygrisiau, Blaenau Ffestiniog LL41 3TP

What's On the Hero Xtreme experience with Go Below Underground Adventures?

After getting roped up and ready at your base, you'll hike to the 1860's entrance of Cwmorthin Mine, nicknamed The Slaughterhouse for its terrifying reputation...

  • Get kitted up at the Tanygrisiau base
  • Enjoy stunning scenery as you journey up to the mine
  • Zip line over gaping chasms
  • Traverse ancient ledges and rope bridges
  • Climb ladders up towering chamber walls
  • Abseil into the abyss
  • Cross deep water and explore eerie underground buildings
  • Stop for lunch at the Xtreme Picnic Bench - bolted to a 120-foot-high chamber wall!
  • Reach a depth of 1,300 vertical feet, the deepest publicly accessible point in the UK!
  • Please note: After booking, you will receive a confirmation email with Go Below Underground Adventures phone number. Please call this number to arrange the date and time for your chosen activity. 

Get ready to satisfy the thrill-seeker inside you with Go Below!

Enjoy underground caving in North Wales

Go Below Underground Adventures aren't just a tour provider - they're pioneers of creating some of the most exciting activities in North Wales. Whilst they provide the experience, knowledge and safety gear to ensure you have a fantastic day underground, all you need to bring is your sense of adventure!

Plus, with small group sizes, you'll gain the added benefit of having a truly personal experience with an expert guide, so you get the chance to receive professional tips, tricks and techniques to help enhance your journey.

Whether you want to explore the world below or dive into something new, Go Below have something for everyone. Book tickets today and have them delivered instantly via email & SMS. 

Location

Tanygrisiau station (Ffestiniog Railway)

Tanygrisiau,
Blaenau Ffestiniog,
LL41 3TP
 
Directions:
Please note: You will receive comprehensive details about your meeting point after the team have confirmed your booking.
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How to find us

Please note: The meeting points for your Underground Adventures may vary. Please ensure you are heading to the correct location for your chosen activity. 

Meeting Points:

  • Challenge: Go Below Underground Adventures, Conwy Falls Conwy Falls Forest Park, Pentrefoelas Rd, Betws-y-Coed LL24 0PN
  • Hero Xtreme: Tanygrisiau station (Ffestiniog Railway), Tanygrisiau, Blaenau Ffestiniog LL41 3TP
  • Ultimate Xtreme: Tanygrisiau station (Ffestiniog Railway), Tanygrisiau, Blaenau Ffestiniog LL41 3TP
Facilities
  • Parking
  • Toilets
More Info
How do you book your Go Below Underground Adventures activity?

So you've decided to go underground - that's great! Simply choose which activity you'd like to conquer and follow our easy, stress-free checkout to book your tickets.

  • After booking tickets, you'll receive a booking confirmation email
  • On the email, you'll find a contact number for Go Below Underground Adventures
  • Call the team at Go Below and select the date and time you'd like to attend
  • The team will schedule in your session for your chosen date and time, and you'll receive a further email with details of your meeting point
Are Go Below Underground Adventures wheelchair accessible?

Due to the nature of the trips, Go Below activities are not wheelchair accessible. 

Are there any age restrictions on Go Below Underground Adventures?

To ensure the safety and wellbeing of participants, Go Below operates by a strict age-limit policy.

  • Challenge: 10+. All under 18's must be accompanied by an adult. 
  • Hero Xtreme: 14+. Under 18's require one-to-one supervision from an adult)
  • Ultimate Xtreme: 18+ only
What should you bring to Go Below Underground Adventures in Wales?

The team recommend bringing a hands-free backpack with snacks, water and any personal items packed. You should also bring clothing that may get wet, including waterproofs. 

Where is the meeting point for my Go Below activity?

Please note: The meeting points for your Underground Adventures may vary. Please ensure you are heading to the correct location for your chosen activity. 

Meeting Points:

  • Challenge: Go Below Underground Adventures, Conwy Falls Conwy Falls Forest Park, Pentrefoelas Rd, Betws-y-Coed LL24 0PN
  • Hero Xtreme: Tanygrisiau station (Ffestiniog Railway), Tanygrisiau, Blaenau Ffestiniog 
  • Ultimate Xtreme: Tanygrisiau station (Ffestiniog Railway), Tanygrisiau, Blaenau Ffestiniog
Is there food and drink available at Go Below Underground Adventures?

You'll need to bring your own food and drink with you. There will be opportunities in the trip to sit down and enjoy your lunch. 

There is also food available at the Conwy Falls Cafe, near the Conwy Falls meeting point for Go Below's Challenge experience. 

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