Because site visits are used so extensively in evaluation and because the consequences of poorly planned and conducted site visits are dire for so many evaluation constituents, it is essential to get it right. This issue discusses and defines site visits and what it means to get it right in planning, conducting, and using site visits in program evaluation. Learn about: strategies for a wide range of evaluation constituents who commission, plan, conduct, and use site visits implications of rigor, ethics, and quality of site visits challenges and possible solutions to problems linked to the high cost of commissioning site visits the potentially devastating consequences of poorly designed or implemented site visits. This is the 156th issue in the New Directions for Evaluation series from Jossey-Bass. It is an official publication of the American Evaluation Association.