Sap as it came from the tree, right, halfway through the boiling process,center, and boiled down to syrup, left, are seen during the annual "Sap Tappin'" event at Douglas-Hart Hature Center in Mattoon, Ill. Visitors to the event get to see how maple tree sap is made into syrup. (AP Photo/Journal Gazette, Ken Trevarthan)

Ken Trevarthan