sentences:  Pulau Tekong and Pulau Tekong Kechil were formerly home to 10 villages while Pulau Ubin was home to a number of granite quarries.At present, Pulau Tekong houses the Singapore Armed Forces Basic Military Training Centre while Pulau Ubin is one of the last areas in Singapore that has been preserved from urban development, concrete buildings and tarmac roads.North-Eastern Islands planning area shares maritime boundaries with Changi, Pasir Ris and Punggol.