Photography Theme Ideas Help!

Hello everyone!

I am in college and studying abroad next semester. I am going on an unique program called Semester at Sea which you take classes aboard a ship and travel to different countries around the world including: Puerto Rico, Brazil, South Africa, Maritius, India, Myanmar, Vietnam, Hong Kong, China and Japan. With that said, I am signed up for a digital photography class onboard (hopefully i get into the class) So for the class we need to compile a project along the way that will eventually tie all the countries together. I need some 3 different themes. Examples have been about food, housing, and landscapes. I was just wondering if you guys have some great theme ideas for this trip ( I will have great photography subjects) just say em...the more the better. Thank you in advance, Andrea

Just a few that came to mind...

People
Clothing
Cars
Architecture

I'll see if I can come up with a few more...

Communication
Transportation
One particular color - choose one
Education
Generations
Kids
Open a dictionary to a random page and put your finger down.

Have you thought about doing Food?
or different Signs?
(With all the different countries, different signs from each my be kind of neat.)