Rambutan. This fruit looks slightly poisonous due to the long stringy red hairs that stick out from it, but grasp the golf ball sized fruit in both fists, twist it hard to break open the hairy outer shell, and you’ll find tangy white fruit in the center.
Pineapple chicken. Don’t knock it until you try it! The sweet fruit combined in a sauce with grilled chicken is a combination that your taste buds will thank you for.
Sushi. If you’re in Asia, you have to try it! Not up for raw fish? Try a California roll; its only ingredients are sticky rice, vegetables, and some sort of cooked fish (likely crab) in the center. If you buy anything off the street, ask your guide for advice—foods washed in local (read: untreated) water can make you seriously ill.
Coconut milk. Buy a half from a vendor, or better yet, get one with a straw to spare yourself the embarrassment of breaking it open yourself on the street.
A salt field on the way there. Farmers allow their wide, flat fields to be regularly flooded by the nearby sea; when the water evaporates, the leftover salt is piled into small heaps that are later shipped off to be iodized before distribution.
The history. Ayutthaya is one of just a few UNESCO World Heritage Sites in Thailand. It was the capital and center of the country for hundreds of years until it was taken by the Burmese in 1767, and the ruined city still has dozens of intact Buddha statues and temples that stand impressively tall.
Some shopping in the nearby market. You can buy anything from dried peppers to amulets. The fruits can be colorful and cheap, but unless you want to get sick, you’d better wait until your guide can verify that the food has been washed in clean water.
Learn how to use a squatter toilet. You’re going to have to at some point, so you might as well figure it out early. Take TP with you; it is not available in public restroom (except in hotels where you will likely have “Western-Style toilets.”) Also, you may want to carry some small change (and instant hand sanitizer) on you as some places charge for the use of these facilities.