Pulau Tekong, also known colloquially as Tekong or Tekong Island, is the second-largest of Singapore's outlying islands after Jurong Island. Tekong is located off Singapore's northeastern coast, east of Pulau Ubin. Since the 1990s, the island has been used by the Singapore Armed Forces (SAF) and is generally restricted from public access. Transport to the island for permitted persons is via the SAF Changi Ferry Terminal at Changi Beach.

Pulau Ubin, also simply known as Ubin, is an island situated in the north east of Singapore, to the west of Pulau Tekong. The granite quarry used to be supported by a few thousand settlers on Pulau Ubin in the 1960s, but only about 40 villagers remained as of 2012. It is one of the last rural areas to be found in Singapore, with an abundance of natural flora and fauna. The island forms part of the Ubin–Khatib Important Bird Area (IBA), identified as such by BirdLife International because it supports significant numbers of visiting and resident birds, some of which are threatened. Today, the island is managed by the National Parks Board, compared to 12 agencies managing different areas of the island previously.