Free Online Maps and Aerial photos
TerraServer - TerraServer contains 3.3 tera-bytes of high resolution USGS aerial imagery and USGS topographic maps.
Maptech MapServer - I've used this to find ghost towns.
TerraFly - I've used this in helping to find ghost towns also.
A LOCATION GUIDE TO THE GENERAL LAND OFFICE (GLO) SURVEY PLATS
U.S. Geological Service - An excellent source for a variety of maps and to help you find what your looking for.
Old and Abandoned Military Bases and Forts
A Journey Past - Military Sites - Lots of links to military and military history sites.
U.S. Dept. of Defense - Military History - About a dozen links to government military history sites.
Ghost Town Sites
Ghost Towns - Lists some ghost towns in the USA and Canada.
Ghost Towns - USA - List some ghost towns in the USA.
Bygone Towns - Lista ghost townsa in the USA and around the world.
Metal Detecting/Buried Treasure Sites
Lost Treasure - The website for the magazine.
About Treasure Hunting
Coin & Relic Gazette
Discovery Quest - Dedicated to Responsible Treasure Hunting, Metal Detecting, Historical Research and Collecting.
TreasureNet - The Official Homepage Of Western & Eastern Treasures Magazine.
The Federation of Metal Detector and Archeological Clubs (FMDAC)
Successful Treasure Hunting
Buglers Shack - Introducing the world’s first live internet radio show covering Prospecting , Metal Detecting, and Treasure Hunting. Featuring live interviews with amateurs and experts in all aspects of treasure hunting, guests from manufacturers and dealers, field reports on equipment, and live coverage of major events and contests.
American Memeory - American Memory is a gateway to rich primary source materials relating to the history and culture of the United States. The site offers more than 7 million digital items from more than 100 historical collections.
The Illinois History Resource Page - Many, many links concerning the history of Illinois and a few of the cities in Illinois.
eHistory - eHistory consists of over 130,000 pages of historical content; 4,000 timeline events; 400 battle outlines; 300 biographies; and thousands of images and maps.
National Geographic - Lots of great articles about the history of areas all around the world.
U.S. National Archives & Records Administration - Many online resources to help you with your historical research.
Wisconsin Historical Society - Lots of maps, military records, and images related to Wisconsin.
The Library of Congress