The Crypt of the Rosslyn Chapel is said to lead to a further, larger Crypt containing the Holy Grail, the Treasure of the Knights Templar, and the mummified head of Our Lord.
No Photography Allowed, the sign indicated, but the silent, flashless, stealth iPhone is an excellent tool in these circumstances.
Once I looked at this hurried image…it revealed, in the shadows, a hidden door to a further chamber. I slipped through this, and was able to retrieve the Holy Grail. It now takes pride of place at the centre of my new IKEA dining table.