Rome........I don't know if you can smell a ghost, but it would seem reasonable that you can. This thread has been fun but also interesting in that the 'ghosts' seem to be not apparitions but in the form of uncanny little events.
Here is one. It's totally gospel and I suppose it is dull and boring in itself; I can't say that I was in a graveyard and looking at a crypt about 8ftx8ftx8f with solid rusted iron doors with no lock handle or inscription and into which I fell down through the earth and found myself in the crypt with no way out except a dug out tunnel and was forced down by chasing mummies and the tunnel was encrusted with massive sapphires, emeralds and diamonds, with corpses surrounded by pots of overflowing gold. That would just be Scooby Do. No this was real. And I will not embellish it. Ads I say, it may sound boring. Well, I was on an evening walk in Skipton, UK, with my gf, around the castle, the partial moat, etc. The history is massive, the town ad hock grown up around it. The massive oak doors have slots for muskets, etc, the civil war of the 1600s as if yesterday, Mary Queen of Scots enprisonment period. the courtyard is small and has a twisted ancient tree with blackbirds. Anyway, we was just on the final leg of the walk which saw us walking between the castle wall an the road. The ad hockness ment that we was walking on a walkway about 6ft above the road with a sheer drop to it, but a railing, no worries. Traffic was constant. Now this is when it happened. I noticed upon the road a small platitc bag, the grip seal type, 2 inch x 2.5 inch, with the two white writing panels. It had been run over many times. It was nothing, just a bit of rubbish, nothing at all, yet my eye was drawn to it as we walked past. Suddenly I was struck with a strange compulsion: to get the bag because it had a fine diamond in it! Crazy. I walked on, but the feeling became so intense and would not leave me that I was forced to, like a stupid idiot, go over the barrier and drop down into the road and retrieve the bag. Madness. But something was....I just knew. I got the bag, got back up to the path, opened it and there was a single solitary diamond, about 9mm dia. I took it to the official diamond-testing lab, the gov one, and it was a high quality clear and white diamond, and they gave me a certified certificate for it. I was very poor at the time. I sold it and paid a bill and bought a classic yam dt 175, which I still have. But I knew, that weird moment. I controlled me. I knew. It wasn't a guess, I knew!