Built around 1889, this Cantonese-style mansion with southern European elements belonged to merchant Lou Wa Sio (aka Lou Kau), who also commissioned the Lou Lim Ioc Garden . Behind the grey facade, an intriguing maze of open and semi-enclosed spaces blurs the line between inside and outside. The flower-and-bird motif on the roof can also be found in the Mandarin's House and A-Ma Temple. Free guided tours in Chinese on weekends (from 10am to 7pm).