Cactus Cereus night bloom beautiful white flowers. Кактус цереус. Ночные цветы

Awesome flowers ! There is one of my favorite places here in L.A. where cactuses grow in vintage style living area. I visit there pretty often when cactus trees bloom. Strange, why they bloom only at night? Ok, I have a time to come and watch how flowers open and bloom... Wow how beautiful they are !!!!! These bloom all night long, then closes in early light, on sunrise. They never open twice, but at evening new flowers will open and beauty will back again and again.