The tall, skinny palms in this picture are Mexican fan palms.
Common name: Mexican Fan Palm
Plant Link: http://plantsdatabase.com/go/51656/
Yes, it is the Los Angeles Arboretum in Arcadia.
They filmed parts of 'Paradise Island' and many movies there.
There is a palm just out of the range of this photo that recumbant for 15-20 feet, and then it curves up into the air. Most of the length along the ground this tree is hollow- yet it still lives and looks great. Palms are amazing.