US 21 south end, 1968-1984
Hunting Island (dates are approximate). As of 2008 the "End" assembly was still posted here, despite the fact that in about 1984 the state extended the US 21 designation south to the new state park entrance.
US Highway endpoints in South Carolina
The URL for this map ends with the 2-letter state abbreviation "SC"; if you'd like to see endpoints in Georgia, just replace the "SC" with "GA". You can quickly jump to any other state using that method, with a few exceptions: for any of the six New England states, use "ME". For Delaware, use "MD". For Nevada, use "CA".