Where I am right now, if you want landscaping vegetation, you have the following choices:
3. Chapparral scrub
4. More cactus
The most popular choice appears to be 4.
Where we have ivy on our freeway verges at home, here they have cactus. Where our yards have shrubbery, theirs have cactus. Where we have windbreaks made of trees, theirs are made of cactus.
On one side of the freeway are expensive housing developments. On the other side is an Indian reservation. Empty fields or scrub, dotted with the occasional ranch-style house, and the even more occasional GINORMOUS CASINO.
As the riddles always end,
Where am I?