This is a series of 9 caches along an old railway line from the 1800’s which is now a cycle path between Rickmansworth and Watford. The whole path is roughly 3.5 miles long and can be done in stages or shouldn’t pose a problem to do all in one go. The route will take you over rivers, canals and along side lakes. For more info, a quick google search will get you some background knowledge on the track.
The whole series is railway themed with some links slightly more tenuous than others. The containers vary from micro up to regular. The path is popular with walkers as well as cyclists and is often used by horse riders. The path can be very muddy in places and there are a couple of slight gradients to negotiate.
Not really much of a tunnel but it was the best we could find on the walk. The coordinates are the best we could get given the location.
Zntargvp, 5sg hc.