42.195

you need more than half an hour to cover it, driving at 80km/h (no traffic lights, no jam)
it's enough to make your ass crack (like really split) if you cycle.
it's going from pasir ris park to changi village, back to pasir ris park and then back to changi village and back to pasir ris park.
it's more than physical, i really hope i'll still be alive on 3rd December 2007.