Geocaching is a treasure hunt for the digital generation. It's also number 49 on our list of 50 Things to do before you're 11 ¾.
Track down the co-ordinates on a smartphone app or GPS to find hidden boxes, known as ‘caches’. Inside most caches you’ll find a log book for you to leave a message and a strange array of trinkets that people have left to swap.
Explore Newark Park in Gloucestershire and you'll find more than beautiful scenery. See how many of the nine hidden geocaches you can find.
Go on a modern-day treasure hunt at Lytes Cary Manor in Somerset and see how many of the five hidden geocaches you can uncover.
Use your smartphone or GPS to discover three geoacaches at Roseberry Topping in Yorkshire, and you'll unlock the secret to find the fourth hidden cache.
Geocaching at National Trust's Allen Banks and Staward Gorge is a fantastic way to explore Northumberland. Take your smartphone or GPS, an eagle eye and a spirit of adventure.
You can reserve a GPS to use on your trip to Polesden Lacey in Surrey, to help you track down the geocaches that are hidden there.
Go on a treasure hunt with a GPS or smartphone at Wicken Fen, Cambridgeshire, and you might be able to find the four wildlife-themed geocaches hidden there.
How many of Tyntesfield's six geocaches can you find? Round up your friends and family and go on a treasure hunt in this wooded parkland.
There is so much to discover at Clumber Park in Nottinghamshire, and geocaching is a fantastic way to explore. There are more than 20 geocaches - how many can you discover?
How many of the Clent Hills' geocaches can you unearth? There are four caches hidden around this special place in Birmingham for you to discover.
Take one of the three trails at Dunwich Heath estate, Suffolk, and discover buried treasure. There are geocaches hidden all around - how many will you find?
Go searching for geocaches with National Trust adventurer Leni.
Geocaching is the modern way to hunt for treasure, and there's plenty to find at some of our places. Borrow a GPS from us or use your smartphone and see what you can find on a family treasure hunt.
What could be better than heading out as a family and exploring the countryside from two wheels? Our woods and parklands are perfect for little legs (and older ones too) to pedal around.
Read our selection of the best of our places to visit this autumn, chosen by those who know best - children and their parents.