This is for a friend who is off to Turkey for at least 4 weeks (no, not jealous...much!) and worried that without a gym, she'll lose her fitness. Not a chance!
Apart from using your feet to get you from location to location - or a bike, or a surfboard - you can also:

PS90X DVD

take fitness DVDs
print workout plans (Women's Health is a great resource)

Subscribe to a fitness mag

take fitness magazines with workout plans that don't require equipment
take a walking/cycling/hiking tour
be conscious of selecting healthy food options

No. Just no.

avoid drinking alcohol - empty calories and after enough, you're likely to make poor food choices too!