From the State Department's Bureau of Consular Affairs, this website has travel information for every country in the world including entry/exit requirements, crime, medical facilities, and recent embassy notices.
STEP is a free program offered by the State Department that registers U.S. citizens traveling or living abroad. The information provided helps the State Department better assist travelers in event of an emergency or provide information regarding dangerous conditions.
This is the CDC's portal to health information for international travelers. Information is available for countries around the world regarding recommended vaccines, how to find a healthcare provider abroad, and outbreaks and travel precautions.
This site covers everything from how to get a passport (and how long it will take to get it) to information on travel warnings (i.e., hot spots around the world that the State Department has deemed an unsafe place to travel). ...