John,
If you do visit the Labrador Tunnels, immediately just up the hill behind the tunnel site (along Pepys Road) is a small museum called "Reflections at Bukit Chandu".
http://www.s1942.org.sg/s1942/bukit_chandu/directory.htm
The museum is built in the colonial era house where the Malay Regiment did its "last stand" against the Japanese, holding out till they were effectively wiped out.
https://maps.google.com/maps?saddr=Labrador+Secret+Tunnels,+Labrador+Villa+Road,+Singapore+119189&daddr=Pepys+Rd&hl=en&ll=1.274845,103.797626&spn=0.021367,0.026157&sll=1.274845,103.794365&sspn=0.021367,0.026157&geocode=Fb9fEwAddOMvBiEbq_lHq8ue7in9mK1m6hvaMTEbq_lHq8ue7g%3BFQqIEwAdiMQvBg&t=h&dirflg=w&mra=ltm&z=16
The museum is also smack in the middle of Kent Ridge Park which follows the ridge line of the hill. Kent Ridge Park features a couple of attractions which may be of interest to you:
(1) They have an AMX-13 on static display in a car park about 200 meters west of the museum. You can get some nice detail shots of the tank in case HobbyBoss releases it later this year (they already have a Panhard with the AMX-13 turret!)
(2) On the nature side, they have a nice (and shaded) "tree-top" walk. Basically it is a walkway built at tree top level (30 feet above the ground) with plaques every few feet describing the trees and flowers. Furthermore, they have a historical map halfway along the walk showing you the locations of various battles in relation to Kent Ridge.
(3) They have a M114 Howitzer a little bit further past the AMX-13 near the driveway into the park.
Unfortunately, my wife got tired of me visiting historical sites around the island so I never got to the Labrador Tunnels. I am saving that for a future trip to Singapore (not sure when though).
Cheers!
+Y.C.
