The National Diving & Activity Centre (NDAC) Chepstow site is permanently closed.
We’d like to thank all our customers for their support over the years.
Notice of site closure
The National Diving & Activity Centre is permanently closed. We are not taking bookings for leisure activities or public diving.
We’d like to thank all our customers for their support over the years.
Opening Times
Diving Times
We are open for scuba diving during weekends.
Activity Times
The Wire Zip Slide and Atlantis Aqua Park are available to book now for dates during the summer. Other activities such as the Giant 3G Swing will remain closed at this stage
Please be advised that the NDAC office is closed Monday to Thursday, so emails and phone calls may not be responded to during this time. Depending on when you make your enquiry it may take a few days before we can get back in touch with you.
Please be advised that the NDAC office is closed Monday to Thursday, the main phone line is currently not manned and has no answerphone system in place. Emails are responded to daily so please use our contact form or email
with any urgent matters.
Due to the weather conditions, we have made the decision to cancel the Wire Zip Slide on Friday the 29th October.
We do not make these decisions easily, however, customer safety is our number on priority.
We will be sending out voucher codes to enable you to rebook your experience on a later date. These will be sent out via email later over the weekend.
We apologise for any inconvenience and disappointment caused by this.
Giant 3G Swing
Experience Weightlessness 245 feet in the air
with our ultimate adrenaline-pumping blast!
The Giant 3G Swing returns 2022
The Giant 3G Swing is now closed for the Winter and will return in 2022.
If you dare, you'll be strapped into the Giant 3G Swing, hoisted 50ft up into the air and slowly pulled back to the release point...
Then it is down to one of you to pull the ripcord!
After the initial terrifying drop, you'll launch into the air, feeling the G-force as you swing up into the sky, 245ft over the steep quarry edges of the UK’s Deepest Inland Dive Site.
You will then be momentarily weightless before accelerating through double gravity as you level out at the bottom.
You will continue to swing several times until our experienced staff bring you to a halt and carefully lower you down to the ground.
The Giant 3G Swing activity takes place at the National Diving & Activity Centre, near Chepstow. The NDAC is home to the UK's deepest inland dive site and one of the UK’s Longest Zip Wires. We have a range of other exciting activities you can try including Kayaking, Stand Up Paddle Boards and Flyboards. We also have a Wooden Wigwam Village and fantastic View Cafe Bar if you want to make a weekend of it.
What happens on the day
Upon arrival you will be directed where to park and book in. Once you have booked in, completed all the necessary paperwork and issued with your wristband you can make your way over to our giant 3G Swing. We suggest heading over to the Swing itself around 10 minutes before your flight.
After a short safety briefing you are ready to be harnessed up and strapped into the 3G Giant swing as a pair. You will both then be hoisted some 50ft in the air and pulled backwards to the release point.
When ready you will then pull the ripcord to release yourself and feel the G-force as you fire up into the sky, 250ft in the air above our quarry. Then you will be momentarily weightless before accelerating through double gravity as you level out at the bottom.
Please note this experience during popular times or inclement weather may take longer that you anticipate to swing so please bear with us as sometime factors outside our control do occur from time to time.
This exhilarating challenge can also be viewed by loved ones from our viewing area at the View Cafe Bar.
What you need to know
You must be aged over 12 years and taller than 1.3m to ride The Swing. If under 16 you need to be accompanied by an adult/guardian
Activitiesgenerally run selected weekends, bank holidays, some school holidays and occasional mid week dates. Please see our booking page for availability.
Upon arrival you will be directed where to park and book in. Once you have booked in, completed all the necessary paperwork and issued with your wristband you can make your way over to our giant 3G Swing. We suggest heading over to the Swing itself around 10 minutes before your flight.
