Not exactly an "abandoned" building, but close enough as I have a special liking for old buildings. Had a chance to visit this beautiful place as part of the Street Superior Festival 2018.
The Pasir Panjang Power Station "A", the building was decommissioned in the early 1980s and returned to the government in 2017. It was Singapore's second power station, built between 1952 and 1953, after St James Power Station, and the ‘B’ station added adjacent to it in 1965.
More pictures: Pasir Panjang Power Station "A" (28 Oct 2018)