2 years later, we were passing by and decided to stop. still an amazing place. it was 7°c at the other side of the tunnel but here it's 11. 4G is still good, good enough to work online if you have an 4G antenna. also, dog loves the place. we can let him go freely since there is nothing and nobody (but there's cows in the summer). flat, great view, amazing sky at night.