A psychologically and physically thrilling experience. Sub-Terra takes guests down into the darkest location of the Forbidden Valley, deep in the catacombs below the Nemesis monster. Enjoy a guided tour of the facility, in the safe hands of the military group who protect the world from it - The Phalanx.

Sub-Terra is under strict military lockdown and currently unavailable for your mission.

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Your worst nightmare underground

Ride Information

Ride Information

Ride Stats



Forbidden Valley

Can you ride?

You need to be at least 1.4m tall to experience this ride.

 What has been discovered underground? Find out in the hidden chamber deep within Forbidden Valley. 

Brace yourself, this experience includes smoke and special effects.

Take your word for it

Aran O'Doherty ‏@AranODoherty 29 Aug 2013

Nemesis sub terra wow that was scary

Ryan David Walker ‏@Ryza_Walker 17 Oct

Time for Nemesis Sub Terra #AltonTowers

Melly ‏@Mel_Dawes Apr 6

The boyfriend and I with the creepy gas mask people who jump out at you in nemesis sub-terra 😂 #altontowers

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