Many travel sites now include virtual tours and / or videos to provide prospective clients an overview of special features or sights that they might like to visit. There are also websites dedicated to providing virtual tours. Doing a Google search for 'travel virtual tours' provides a number of such sites.
Panoramas DK provides 360 degree views of selected locations throughout the world. USA 360 Virtual Tour provides 360 degree panoramas using Google earth view of selected sites in the United States of America.
Armchair Travel Company provides virtual tours allowing you to experience heritage listed buildings throughout the world.
Virtual tours therefore provide the opportunity to explore places without having to leave home.