MAPS
View Antietam on one of the following maps.

• Google map/image/topo/terrain or street view
• maptech USGS topo, mouse tracking (NAD27)
• mytopo or topoquest (quad name) or Topozone (caltopo) or trails.com or OSM contour
• GPSVisualizer maps or Gmap4 hires topo
• CalTopo.com 1885-1915 or 1915-1945
• CalTopo.com contoured aerial or US topo aerial or shaded relief topo or slope-angle shading topo
• Google map measure distance (right-click)
• ACME mapper or ArcGIS topo
• USGS topo quads or historical topos national map topo viewer geopdf
• Java topo map with nearby landforms, distance tool (deprecated)
• Road maps: MapQuest or OSM or Google or MapPoint or bing maps or driving directions
• Microsoft VE map/image
• flashearth.com images
• GeoHack maps
• leafletjs map (non google), with markers falls
• Google maps with markers waterfalls    arches    sinks    towers    cohp    ramps    GSMNP    BSF    AT   
• list of nearby landforms ( nearby.gpx) or lookout towers or ramps or high points
• listsofjohn topo quad peaks
• USGS elevations: NED 10m (XML) or json or SRTM 30m or from Google elevation (m)
• MSU geo data county, elevation, topo quad or UScensus data or geoplugin data or google reverse geocode lat/lon to address
• nearby Tennessee historical markers
• nearby geocaches or waymarks or benchmarks NGS data sheet

For current point, create a waypoint file, tnmap.gpx or send waypoint to your Garmin GPS
NOAA weather at this location or wunderground