The name of the park is Bonfante's Garden Theme Park.
It is located in Gilroy - garlic capitol of the world.

some people may call this type of pruning topiary, while others may call is arborsculpture and still more may call it bondage.

There is a website for this garden, which I have checked out in the past, but I can't locate the address.
I used to buy large trees from his nursery - Hecker Pass Nursery, but now it is a horticultural theme park.

Here's the link. If you click on "media" and then on "photographs," you can see some pictures of the trees (which aren't only topiary, BTW; seems he also does strange things to treetrunks and other parts).

Here is a link that might be useful: Click here: Bonfante Gardens Theme Park -- Home of the Circus Trees!

yes.. I saw an article in a magazine called WET.. it featured his work.. I think alot wssold to Dysney... glad to see it was thing that got saved after his death... It was a dynasour park for a bit i think...
APPROACH GRAFTING is I think the tearm for his work... binding two bits of growing material together .. after scrapeing theoutside bark off both parts..
I tried to make a liveing fence from a row of crabapples in a line... the limbs were espaliered in a line... and when the limbs overlapped they were treated in this approack grafting technique.. but I sole the bit of land before it eally took hold. and the fence was disantled by the new owner... along wih abunch of fruit trees I'd had grafted to my specifications.. lovedhis stuff... thought he's quite a foward thinker... thanks for the link... Gordon

Unfortunately Bonfante Garden had few visitors and has closed there door (probably to reopen in Spring) I had not visited myself but I was told that it was "fascinating". Hopefully, they have not closed there doors for good.