Some sites that I have found useful.
|Huntsville Grotto||The northern Alabama grotto of the NSS|
|National Speleological Society||National caving organization|
|Southeastern Cave Conservancy||Support this group that preserves caves|
|NWS Snow Map||Useful map of snow levels|
|Snotel||Snow data from specific weather stations in the Rockies|
|NPS Morning Report||News from the National Park Service|
|CalTopo||A great mapping site|