There are more than 10,000 watchtowers and beacon towers on the Great Wall. They were used to house troops, store weapons and send signals in case enemies were seen approaching. Smoke signals were used in the day and fires were lit at night to communicate with other military outposts along the wall. Some towers are standing complete and others are crumbling. Many have been rebuilt. Students - you may use these images in your school reports - just right click on the image and select "Save picture as..." Note the panoramas cannot be saved or used. Use of images is for classroom use only and may not be republished on another web site. All images copyright Peter Danford 2004. Next Panorama Send this as a greeting card!