The new research was commissioned by the TV channel to mark the launch of its new series, Expedition with Steve Backshall, airing Sunday nights at 8pm.

Inside the world's largest cave. (Photo: National Geographic)

The research reveals that over eight in ten (84%) Brits say they prefer to seek out adventurous experiences rather than the traditional “fly and flop'” pool or beach holiday.

Ranked at fifth, Son Doong has surpassed other famous names such as the Aurora Borealis, Norway; Base Camp Everest, Nepal; the Antarctic; Cape Town, South Africa; and Humpback Whales, Mozambique.

The world-known biggest cave only came after Mount Kilimanjaro, Tanzania; Inca trail, Machu Picchu, Peru; Grand Canyon, Arizona; and Thrihnukagigur volcano, Iceland.

According to Dave, Son Doong is the world’s largest natural cave and promises unforgettable memories for visitors.

The television station said that due to rugged terrain, visitors were required to register for a tour in advance. Moreover, it is necessary to go with an experienced team with specialized equipment./.