If you are buying a brand-new HDB flat, you would definitely expect a bomb shelter built within it. It doesn't mean you have to live with the way it looks though. This home, for instance, built a full-height bookshelf across it that has the option of swivelling outwards to access the bomb shelter.
Props to the designer who made it look like those mysterious secret passages we often see in movies!
This brick feature wall camouflages the bomb shelter door so well it is almost imperceptible to the untrained eye.