Great collections & ideas, guys! I have pebbles from Chartres & Masada. My memories of other places are enough. Sent Iraq sand to my brother. Still have scars from red ant bites in Texas. Pics from Antietam, Cold Harbor, Gaine's Mill, Gettysburg, & Chickamauga, Yorktown (RevWar), Monticello, Williamsburg, etc.
Fort McClellan had red clay mud too.