I usually start off with( If you have all exspansions)-:) : If you unlocked every item and theme available for this game, including Conservation Breeding Center
A 10 by 20 or 15 Sq ft exhibit (on your left side) a Desert Exhibit
If you have Elevated Paths use them to make a nice organized mall like structure( 10 by 10 or 15 away from the two centerwalkthrous that are divided by 2 paths) Just add all the stands,karts,ATMs( Just 2 ATMs), Gift Karts, Photo Booths on the right of the whole thing.
On the left you, in organitation, put all th plagroung equipment on one side, Kiosks are put into diagnal mode rotation for space of viewing, put them in alliance with each other. Put the Music Rocks side by side until they reach the bathroom which is in the two space divider of the two entertainment areas.
Put in Camels,Oryxes,Addaxes,Tortises, with all their entertainment objects, food, water , shelters, and ect.