Trees with white berries

I have been noticing these trees having white fluffy stuff on it the last few weeks.

Singapore has the so called 'sakura' flower trees, but these white plants are a bit different.
They do not have the pink flowers, and the leaves of these trees are still in tact.




They look quite nice when you are near it.
It looks like white berries.

Anyone botanist out there knows what is this plant called?

What is this structure?

I saw this in Chinatown today and wondered what it is.
I still have no idea. It is a few stories high and it's just empty.

Anyone knows what this is for?



My camera went a bit weird. Some aliens inside?
The two photos that I took seems washed out! haha..