The URA organizing some pretty neat guided walking tours of the city's historical buildings from Oct 20-Nov 28.

There are 26 tours in total, and some of our picks include tours of the Khadijah Mosque (built in the early 1900s), the Nagore Dragrah Indian Muslim Heritage Centre (a shrine in Telok Ayer buillt between 1828 and 1830 by South Indian immigrants), which are held all on Oct 24 at 10am. There are also tours of the Yueh Hai Ching Temple (Singapore's oldest Taoist temple which has won The UNESCO Heritage award this year) on Oct 31 at 4:30pm. 

No registration is required for these excursions and you can check out the full list here