Ok so it's not really a Tomb, well....it could be? But you will need to prepare like it is a Tomb, I recommend a torch, footwear you're prepared to get muddy and your spider repellent kit if such a thing exists ha!
This cache is located it the beautiful village of Foston on the wolds, a tranquil village with some lovely walks near by and this cache is located at the beginning or the end of the walk depending on which direction you come into the village from but i recommend you follow the public walkway and you finally come across a second geocache set by good friends of ours so look out for that one too.
We have rated this one a level 3 based on you may need to be quite agile and brave, Look out for any loose bricks.
Enjoy