Anyways I did some research trial and error work and here is bit more comprehensive list now (previous list removed for to be clear).

Align

when ground is 10m, align your objects as following:

ca\plants\palm_01.p3d - 15.7m (+5.7) 
ca\plants\palm_02.p3d - 16.9m (+6.9) 
ca\plants\palm_03.p3d - 16.9m (+6.9) 
ca\plants\palm_04.p3d - 16.9m (+6.9) 
ca\plants\palm_08small.p3d - 11.5m (+1.5) 
ca\plants\palm_09.p3d - 17.7m (+7.7) 
ca\plants\palm_10.p3d - 17.9m (+7.9) 
ca\plants\akat02s.p3d - 14.2m (+4.2) 
ca\plants\banana_1.p3d - 12.2m (+2.2) 
ca\plants\banana_2.p3d - 12.2m (+2.2) 
ca\plants\banana_3.p3d - 12.2m (+2.2) 
ca\plants\banana_4.p3d - 12.2m (+2.2) 
ca\buildings\afdum_mesto2.p3d - 14.7m (+4.7) 
ca\buildings\afdum_mesto2l.p3d - 14.7m (+4.7) 
ca\buildings\afdum_mesto3.p3d - 15.2m (+5.2) 
ca\buildings\afhospoda_mesto.p3d - 15.2m (+5.2) 
ca\rocks\skala.p3d - 10.4m (+0.4) 
ca\rocks\skala_new.p3d - 14.2m (+4.2 or higher?) 
ca\rocks\skala_newk.p3d - 14.2m (+4.2 or higher?) 
ca\rocks\skala3_1.p3d - 11.2m (+1.2) 
ca\rocks\skala3_2.p3d - 11.2m (+1.2) 
ca\rocks\skala3_3.p3d - 11.2m (+1.2) 
ca\rocks\skala3_4.p3d - 11.2m (+1.2) 
ca\rocks\skala3_5.p3d - 11.2m (+1.2) 
ca\buildings\Letistni_hala.p3d - 18.5 (+8.5) <- airport terminal 

ca\buildings\dum_istan2_02.p3d - 16m (+6) <- huge big building, modern! 
ca\buildings\dum_zboreny.p3d - 12.4 (+2.4) 
ca\buildings\dum_zboreny_lidice.p3d - 12.4 (+2.4) 
ca\buildings\dum_zboreny_total.p3d - 12.5 (+2.5) 

iraq/mog buildings, 10m ground level: 
ca\buildings\dum_istan2.p3d - 12.4 (+2.4) 
ca\buildings\dum_istan2_04a.p3d - 14 (+4) 
ca\buildings\dum_istan2b.p3d - 12.4 (+2.4) 
ca\buildings\dum_istan3.p3d - 12.6 (+2.6) 
ca\buildings\dum_istan3_hromada.p3d - 13.4 (+3.4) 
ca\buildings\dum_istan3_hromada2.p3d - 14.7 (+4.7) 
ca\buildings\dum_istan3_pumpa.p3d - 12 (+2) 
ca\buildings\dum_istan4.p3d - 17.3 (+7.3) 
ca\buildings\dum_istan4_big.p3d - 20.3 (+10.3) 
ca\buildings\dum_istan4_detaily1.p3d - 17.3 (+7.3) 
ca\buildings\Dum_mesto3_istan.p3d - 12.4 (+2.4) 
ca\buildings\dum_olez_istan1.p3d - 12.4 (+2.4) 
ca\buildings\dum_olez_istan2.p3d - 11 (+1) 
ca\buildings\dum_olez_istan2_maly.p3d - 12.4 (+2.4) 
ca\buildings\dum_olez_istan2_maly2.p3d - 12.4 (+2.4) 
ca\buildings\hotel.p3d - 18 (+8)

Hope that helps.