1. Tourists should take into account that it is forbidden to export corals from Guam. Vendors on the beaches and local markets can sell a lot of interesting handicrafts and jewelry made from coral, which is considered a crime, just like buying. Divers should also be extremely careful not to damage corals underwater.
2. Despite the fact that the island is considered to be quite a safe and calm place, it's still worth observing some basic safety precautions. Going for a walk, do not take large amounts of cash and other valuables with you. On the beach and in public places, you should watch your personal belongings and not leave them unattended.
3. Tap water is considered safe but in order to avoid the effects of acclimatization, it is best to use only bottled water for drinking. You shouldn't eat too many local delicacies because national food can be very unusual for foreigners.
Although the culture and traditions of locals were greatly influenced by both Europe and America, people living here are still true to their customs, …
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5. A large part of the hotels and entertainment facilities is located in Tumon and its surroundings. However, in the neighboring cities you can also find many attractive beaches and sights, so you should not limit yourself to staying exclusively in the metropolitan area.
6. Banks and other public offices serve customers Monday through Saturday from 10:00 am to 3:00 pm. Friday is considered a long working day, and on Saturday, institutions may close slightly earlier.
8. All shoppers should pay attention to clothes offered by local boutiques and shopping malls. You get high quality at very attractive prices. Duty-free shops are especially popular among travelers.
9. Travelers who want to explore all the island's important attractions in a short period of time should book a sightseeing tour or a jungle cruise. This kind of excursion would cost you about 120-150 USD. 
