I remember walking along a boardwalk at a reserve in Texas and seeing an American Bittern in the marsh just to the side. It just stood and watched me as I walked right past it. Amazing experience.
We saw a fair number of these Tiger-Herons. This one was standing in a tree, quite some way from water. It allowed me to get relatively close – had this been a UK equivalent it would have flown as soon as it saw me approach.