Documenting Singapore's four lookout towers
They served as diplomatic tools in years after independence
A futuristic "space age rocket" was built in Seletar in 1969 - the same year astronauts from the Apollo 11 space flight landed on the moon.
The structure at Upper Seletar Reservoir, designed and built by the Public Works Department, was one of four lookout towers erected in Singapore in the 1960s and 70s.
The National Heritage Board (NHB) has started documentation efforts on the four towers as part of its bid to expand its database on Singapore's built heritage.
It said Seletar's 18m lookout tower is reflective of the "exploration fervour" of that era.