Lions' Nature Education Centre near Sai Kung is a treasure trove of, get ready for it,
I know! All that's missing are the exclamation marks! And we never said they were interesting in a benevolent way. For example, here is a herbal specimen whose sole purpose (pun fully indented) is to take revenge on those disrespectful people who ignore the signs in parks saying 'do not walk on the grass'...
...and I wouldn't get too close to the followingbit of botany or you may go the same way as this poor lassie:
Who needs a triffid when you can have one of these interesting plants, eh?