Find Them, They're There

I've left coins in different places.
At the time, in Europe, the mid to mid-late-mid 80's, it seemed like the thing to do - I could hide them on a USO bus tour one weekend and miraculously 'find' them a year later.  We're talking mostly Pisa and Rome.  And a few castles in Germany.
Probably zero interest so far.  There is a coin in a hole in The Leaning Tower in Pisa, and one in the Colosseum in Rome.  I shoulda hid coins in the Pentagon and The Empire State Building, but, no.
Nyet.
It ISN'T that easy.
Get a notepad.  Yes, I'll wait.  (Whistling and sighing ensue.)  Ready?  No?!  Dag-nabbit?   (I'm dyin' here.)  A good pen.  Check in the thing by the sink, there's always one there.

The Pisa Coin.
This one ISN'T easy to find.  Due diligence, all that shit.  Get to Pisa.  Buy the ticket to climb the stairs.  There aren't that many, it's a fixed distance roughly 'round and up.'  Go to the sixth level of The Leaning Tower, one step at a time.  Count them, for all I care.  I hope they haven't closed off the 'outdoor rings.'  They may have.  ('They?')  Again, with the 'they.'
On the extreme north side of the Tower, look to a hole in the wall about six feet up, a really round hole, maybe three inches deep or so.  The marble is really white there, so the hole is obvious as 'fruitcake.'
Reach on there with a fingertip, probe, and there I'll be.  Is it the 500 lira coin or the 1965 US quarter?

Maybe you'll tell me.  Shit, I can't remember.

The Roma coin.
This one may be inaccessible now.  Same as before, get to Italy, but this time be in Rome.   It happens with planning, people - SO - buy the tickets for the Colosseum, and deviate from the norm.  You'll be in a group of tourists, wondering about their sniffles, when...  When the procession heads off the first level to go down, veer left.  Really left.  No, lefter thanthat - the outside ring.  At the last 'safe' vestibule there's an old piece of marble column laying on the 'ground.'  Go to the south/southeast side of it and squat down.  There's a raised lip on one side.  From your knees, line up the raised lip to the hole in the wall.  It might take some creative sways, so chill.  It's pretty obvious, once you think about it.
PS... there's a coin in there.

Tell me all about it.