Look at these great pictures of an orangutan named Suryia and the dog who is his best friend and constant companion.
They met at the T.I.G.E.R.S. wildlife sanctuary in Myrtle Beach, South Carolina, where they became fast friends. http://www.tigerfriends.com/RSF.html
T.I.G.E.R.S. also runs a safari park that looks like fun.
I visited a huge number of websites about Roscoe and Suryia, but this one seemed to have the most accurate information.
You can find hundreds more pictures of them on Google Images.