Answer this Riddles !!

@dianagnes (1088)
Singapore
June 29, 2007 6:09am CST
In which place where people may see us even if we hide?? The clue is,it can be found in the world,almost all countries have the place.
1 response
ahgong
@ahgong (10064)
• Singapore
30 Jun 07
A computer?
dianagnes
@dianagnes (1088)
• Singapore
30 Jun 07
Nope..
ahgong
@ahgong (10064)
• Singapore
2 Jul 07
erm... more clues?
1 person likes this
dianagnes
@dianagnes (1088)
• Singapore
13 Jun 08
Ouh AhGong,Im sorry that i forgotten about this riddle and since after a year,you are the only one responded.I shall reveal it to you.The answer is " ICU " hehe..you got it??