• Hang En, in Vietnam is the world's third largest cave and contains some truly stunning sights
• The imposing cave is so big as high as the London Eye and wider than one-and-a-half football pitches
• Visitors pitch up tents on the sand and look out to beautiful turquoise waters 

This beautiful beach probably won't feature in holiday brochures as it is found in the middle of a cave. 

Hang En, in Vietnam, is the world's third largest cave and even has its own climate as well as a river and jungle.

And there's no doubt pitching up your tent here for a camping holiday would be unlike any other and give you that perfect spot on the beach. 

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Exploring the Hang En cave in Vietnam will allow you to spend time relaxing on this stunning beach

You can almost imagine the pirate's treasure to be buried in this place; a secret oasis hidden away from your usual sights

At more than 430ft high, and 495ft wide, the imposing cave is as high as the London Eye and wider than one-and-a-half football pitches.

Photographer Lars Krux, 48, ventured into the cave with his wife Justyna Krux, and a party of tourists, in order to capture some stunning shots.

Lars, from Germany, Hamburg, reached the limestone cave, close to the border of Laos, on foot after a six-mile trek through the thick jungle of Phong Nha-Kẻ Bàng national park

He and his wife Justyna, then had to wade waist-deep through ice-cold water to gain access to the mesmerizing cave.

But after pitching up a tent and spending the night in the cave, Lars managed to capture these stunning images before exploring the depths in a walk through the pitch-black.

Hang En is more than 430ft high, and 495ft across, as high as the London Eye and wider than one-and-a-half football pitches

This would be one camping trip to tell all your friends and family about, with your own private beach being a particular highlight

Hang En is the world's third largest cave and even has its own climate as well as varied scenery

The cave has its own climate, in relation to having a luscious green jungle on its doorstep

Outside the main section of the cave provides similar, stunning views of the landscape in Vietnam

Lars said: 'My general goal is to explore the planet as much as possible and I'd never been to Vietnam before.

'It is hard work to access the cave, because there is no road nearby. The only way to reach the cave is to walk 10 kilometers through the jungle, uphill and downhill.

'You need to cross several rivers with a water level up to 1.5 meters (5ft) and you'll be attacked by dozens of leeches who are attaching themselves to your skin. This is certainly not to everybody's taste.

'After hours we finally reached the cave and I saw that it was worth it to carry about 15 kilos of photo equipment (Nikon D800 camera, lenses, filters, two tripods) through the jungle.

'From above we saw the giant cave with its small turquoise blue lake, the sandy beach in the cave and some tents, our home for one night right in the cave.

'It was amazing privilege to photographer and sleep in such an exclusive environment.'

The En Hang cave is situated close-by to the Hang Son Doong, the largest cave in the world, which was recently discovered in 2009 by British cavers, led by Howard Limbert.

Son Doong is hidden in rugged Phong Nha-Kẻ Bàng national park in Quang Binh province near the border with Laos, the cave is part of a network of 150 or so caves, many still not surveyed, in the Annamite Mountains.

Son Doong cave is more than 660ft wide, 495ft high, and over five miles long, with caverns big enough to fit an entire city street inside them.

To get a sense of the enormity of the cave, that's as wide as two football pitches and slightly longer than the distance of Buckingham Palace to the Olympic Park.