Hidden away in the depths of the Herts countryside is a land that time forgot.

Celtic Harmony, located close to the picturesque village of Brickendon, is an outdoor heritage experience centre which has been taking visitors back through the centuries to Prehistoric Britain for over 21 years.

Herts Advertiser: A chieftain warrior at Celtic Harmony.A chieftain warrior at Celtic Harmony. (Image: (c) Frank Wiersema)

At the end of a countryside track, through huge wooden gates, is a settlement of thatched roundhouses nestled away in native woodland, a reflection of a simpler age of hunter-gatherer tribes, bards telling stories passed down through the generations, and roaring fires to keep the beasts at bay.

Herts Advertiser: Inside one of the roundhouses at Celtic Harmony.Inside one of the roundhouses at Celtic Harmony. (Image: Matt Adams)

Run by an award-winning education charity, Celtic Harmony was set up to provide school trips and residential visits with a first-hand experience of changes in Britain from the Stone Age to the Iron Age and the subsequent impact of the Roman invasion.

Herts Advertiser: Celtic Harmony has something for all the family.Celtic Harmony has something for all the family. (Image: Celtic Harmony)

Although this continues today, the centre has expanded to offer activity days and sleepovers in the roundhouses, providing something truly different for all the family to enjoy.

Herts Advertiser: Celtic Harmony has something for all the family.Celtic Harmony has something for all the family. (Image: Celtic Harmony)

The roundhouses have been authentically built using natural material (probably not cow dung mind) and sleep up to five people in one king-size and three single beds, with electricity points and heating hidden away if required!

Herts Advertiser: A talk on the development of tools in Prehistoric Britain.A talk on the development of tools in Prehistoric Britain. (Image: Celtic Harmony)

It's definitely worth spending the day at the centre before your sleepover, as it allows the opportunity to truly immerse yourself in the past, whether it be spearing mammoths and boar in the depths of the forest, or shaping your own talisman necklace out of clay and hemp twine.

Herts Advertiser: Drumming in the chieftain hut at Celtic Harmony.Drumming in the chieftain hut at Celtic Harmony. (Image: Matt Adams)

Friendly and well-informed costumed guides are on hand throughout the site to demonstrate skills and crafts from this period of history, including friction fire lighting, cave painting, carving arrowheads from soap (!) and weapons training.

Herts Advertiser: Stone-cooked pizza is available for lunch at Celtic Harmony.Stone-cooked pizza is available for lunch at Celtic Harmony. (Image: (c) Frank Wiersema Photography)

The recently constructed Prehistory Centre provides an indoor space for workshops, artefact handling, demonstrations of archery and flint knapping and the exploration of a mock cave complete with Palaeolithic paintings copied from Lascaux in France.

Herts Advertiser: Roasting marshmellows on an open fire.Roasting marshmellows on an open fire. (Image: Celtic Harmony)

Unfortunately activities are restricted due to the pandemic, and although there is still plenty worth checking out inside, it has to be said that the outdoors is where it's all happening.

Herts Advertiser: Creating cave art at Celtic Harmony.Creating cave art at Celtic Harmony. (Image: Hillary Childs)

Blocks of weeks throughout the summer holidays are themed around different periods of history, from Hunter Gatherers and Stonehenge Builders through to Celtic Warriors, but there are also other events at key festival dates during the year, including Beltane (May 1), Summer Solstice (June 21) and Samhain (October 31).

Herts Advertiser: On a quest at Celtic Harmony.On a quest at Celtic Harmony. (Image: Celtic Harmony)

We rolled up not sure what to expect from our visit, but were immediately taken by the warmth and atmosphere of the venue, and before long were heading off on a quest through the woods, which included making dens out of tree branches and answering riddles on the Palaeolithic, Mesolithic, and Neolithic Ages, starting at the very dawn of human culture in a landlocked Britain.

Herts Advertiser: On the trail of mammoths at Celtic Harmony.On the trail of mammoths at Celtic Harmony. (Image: Hillary Childs)

Lunch was exceptionally good, but with a chef who has cooked in a Michelin-starred restaurant then that's to be expected, and we enjoyed delicious stonecooked pizzas fresh from the oven, before heading off to carve our arrowheads.

Herts Advertiser: Roundhouses at Celtic Harmony.Roundhouses at Celtic Harmony. (Image: Matt Adams)

One of the highlights of the day for our girls, five and one, was the chance to hang out with medieval musicians - actually members of Herts heavy metal band Neverworld - and have a go on their selection of drums.

I enjoyed chatting away about unusual instruments from the hurdy-gurdy to the lute, and made a point of checking out their music online afterwards.

After a packed day exploring the camp, we wrapped up with a fire procession through the woods, at which stage those members of the public not staying the night were asked to leave.

Herts Advertiser: Storytelling at Celtic Harmony.Storytelling at Celtic Harmony. (Image: Celtic Harmony)

Alongside four other families who arrived later, the evening was a completely different feast, comprising of a barbecued meal, marshmallow roasting on an open fire, a story of giants and heroes told with wit and flair by one of the guides, and a post-sunset bat walk which fortunately yielded a couple of sightings of the flying rodents.

Herts Advertiser: Making dough at Celtic Harmony.Making dough at Celtic Harmony. (Image: Celtic Harmony)

If you're looking for a different day out for the kids this summer holidays, where education and play work hand in hand, then this hidden gem is on our doorsteps and comes with the highest recommendation. For details see celticharmony.org