If you don’t know whether to visit a foreign country or not, check out www.state.gov/travel before you book your flights.
Pay attention to the countries listed by the State Department as places you don’t want to visit. This site is kept up to date with information on documents, visas, travel warnings, and so much more.
Some other valuable information is to keep your passport with you, keep your tickets with you, carry copies of your passports, visa pages, and travel insurance in a separate place, keep emergency contact information handy, and know what the local customs and regulations are when visiting a foreign country.