I can think of many, including a few jungle ones but more recently, a very small one at a hotel that could only be approached from a high vertical hover and where from photo information I had been given, what I thought was the 'H' in the middle turned out to be an H shaped bed of 4 foot high white leaved shrubs.
After I had shut down the tail rotor was in the middle of it....and about one foot from branches
. It made for an interesting and careful departure... thankfully withoput incident.
I now always check that H's aren't 4 foot high shrubs.
