Washington DC is nearby to three major airports, with the closest being Ronald Regan Washington National Airport. Located only 3 miles from the city, this airport serves primarily domestic flights only. For those coming from international locations, Washington Dulles International Airport is located 26 miles from the city. Various public transportation and private taxi services are readily available. Laid out in a grid format, Washington DC is easy to traverse by foot however many sites are located quite a distance from each other resulting in considerable walking. Visitors should take general precautions that they would in any major city, although they are rarely the target of random crime.