Available to hire for filming with flexible spaces and onsite support. 

Make the most of all we have to offer, experience multiple activities on the same day

High Ropes

Take on a high ropes adventure at our challenging course...

Rush

The ultimate weekend challenge! Conquer 6km of award-winning obstacles and...

Mud Tribe

Gather your tribe! Join the fun at Mud Tribe, a...

Training
Nuclear Fit – May 2026

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Big Drop

Looking for a high adrenaline add on to your Nuclear High Ropes experience? If so, the Big Drop is the perfect end to the session! Experience the thrill of a 50 foot / 13 metre free fall experience – it’s the ultimate test of courage and feeling of exhiliration!

Big Drop

Age 8+

1 Drop

Take on the Big Drop at Nuclear High Ropes! It’s one giant leap for you or your children – one giant sense of achievement for all!
 
Will you take the plunge…?
Do you dare…?
Are you ready to put your courage to the test…?
 
If so, simply add the Big Drop to your High Ropes booking at checkout for only an extra £6 per person and test your nerve at the Nuclear High Ropes’ Big Drop!
What's Included

£6.00 Per Person

Available as an add on to High Ropes & Zip Trek

Features
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What to expect

Biggest High Ropes course in Essex.

3 Levels.

6 Courses.

Easy, medium, and tough challenges.

40m zip wire.

70 aerial obstacles.

50ft Big Drop (available as upgrade).

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Facilities

Open air woodland setting.

Huge free car park.

Indoor & outdoor spectator viewing.

Hot/cold drinks & light snacks available.

Seating.

Free WIFI.

Toilets.

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What to wear

Flat closed toe shoes

Comfortable clothing

Thin layers – you will get warm!

Waterproofs (weather dependent)

Gloves (optional)

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Supervision

6-8 year olds must be supervised by a participating adult (1 adult to 2 children ratio).

8-17 year olds must be supervised by an adult, who must remain in visual contact with the group to support and supervise behaviour. This can be from the ground or as a participant.

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About You

Minimum age 6yrs

Minimum height 1.2m

Maximum weight 120kg

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Safety

Highest category continuous
belay safety system.

Fully qualified staff.

Hands-on induction zone & briefing.

TOP 10 FAQ's

What should I wear?
Wear closed toe, flat, sturdy shoes, trainers are ideal. Remove all jewellery. Glasses will need to be held on with a retainer, if you don’t have one you can borrow one for a returnable deposit. Thin layers (t-shirt, long sleeve top, fleece etc) are best – you can aways take a layer off or add another. Bring a waterproof with you. Although some of our courses are amongst the trees there’s lots in the open air too. You’ll get warmer as you take on our aerial ropes, obstacles & challenges.
Can I buy gift vouchers for friends and family?
Yes — gift vouchers are available to buy online and make the perfect present for adventure lovers.
Do you charge a parking fee?
Parking is free at all sites and events, apart from Nuclear Mud Tribe, which has a £5 parking fee per car. All parking is within a short walking distance.
Is there an instructor or are we on our own?
Your journey will start with and safety brief with one of our trained instructing team. Once on the course your safety will be monitored by the team from the ground. In the event that you need support on the course we can access the course if necessary.
Can adults and children go on the course together?
All participants follow the same journey and all members of your group will stay together throughout.
Can I do more than one activity in a day?
We have a range of activities available and offer 15% Off any bookings that include 2 or more Nuclear Adventure activities
Do I need to complete a waiver in advance?
Yes, all participants will need to complete our Risk Acknowledgment and Disclaimer before you arrive. The lead booker will receive a link to these with their confirmation email and will be asked to forward them to everyone participating
Can we decorate the Party Den?
We want your celebration to be special, so you are welcome to decorate the Party Den while you are with us. We ask that all decorations are removed when your booking is over.
What time should I hire the party den for?
The Party Den is available to hire by the hour and can either be hired solely for celebrating after your activity or as a base for the duration of your event. If hiring for after your activity we recommend starting your hire for 15mins before your activity is due to finish.
Do all parents need to sign the disclaimer?
Participants aged under 18 years old will need an adult (18+) to sign our Risk Acknowledgement and Disclaimer. These digital disclaimers can be sent to children's parent/legal guardian by the lead booker using the disclaimer portal.
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How to find Nuclear Adventures

Find us

How to find us

We are based on top of the biggest & deepest cold war bunker open to the public in SE England: Kelvedon Hatch Secret Nuclear Bunker, Ongar Road, Kelvedon Hatch, Brentwood, Essex CM15 0LA

Download the what3words app and navigate to: fight.inspector.beams. This will bring you directly to Nuclear Adventures.