The best way is to use Google to target locations. You can target by websites, such as
washingtonpost.com Â» Travel Section Front,Middle right
Or by location, such as
Hong Kong (Country)
Honolulu, HI, US (City)
For the first one, select "Placements" under your ad group.
For the second one, choose "Edit Campaign Settings" under your campaign.
It can get expensive though, so put a limit per day, perhaps $20/day until you run it for a few weeks to see what is going on.