Move around the map and zoom in as you would with any interactive map. In the top left corner, you can switch the map view from the default Terrain view to Street Map, USGS Topo map, and NC OneMap Aerial. Hover the mouse over an icon to see the waterfall name. Click on the icon for more details on the waterfall, including a link the waterfall's main page.
Note that when you zoom far into some of the map layers, the waterfall icons may not display directly over the streams.