Are you familiar with the night-blooming cactus known as, Queen of the Night? There is one in my backyard. For obvious reasons, it is hard to get a good picture.
I took this picture this evening before it got completely dark.
Here is one that I took last night. It doesn't bloom every year; but it does most years, and the bloom only lasts one night. This cactus is very large with over 50 blooms that will pop out a few each night until they are all gone. I just love this plant. Isn't mother nature fabulous?