A few hours of unscheduled time is all you need to immerse yourself into one site, event or place when on business travel. When last in Phnom Penhg we had exactly that: 3 hours to see Choeung Ek’s killing fields.
This place and its histroy will shake you to the core:
Leica M246 with Summilux M 1:1.4/50 at f/2 and 1/4,000 and ISO320
Leica M246 with Summilux M 1:1.4/50 at f/2.4 and 1/1,500 and ISO320