Directions
Every feature that is displayed on the map (Waterfalls, Points of Interest, Parking) has a location in its details section. It looks something like this:
This just happens to be the location of Baby Rockway Falls in the Rockway Conservation Area.
Clicking on the location will open a map showing the location with a red dot: 
Right clicking (or long press on mobile devices)
will open a context menu with the option Open in Google Maps...
Hint!
If a feature (Waterfall, Point of interest) has a Park listed in the statistics section, go to the park's page, which lists the facilities available in the park, including parking facilities. Getting directions to a car park will probably be more useful than to a waterfall, which might be some distance from the closest road. Also, look in the waterfall's 'Trails' section - there may be a route listed from a specific parking area to a given destination.
Beware of using Google Maps to give directions directly to a waterfall, rather than a car park! The algorithm attempts to get as close as possible by car and then instructs you to walk the rest of the way. For example, the directions it gives to Tiffany Falls include driving down a private road and scaling a 100ft cliff, rather than driving to the car park and taking a leisurely stroll up the trail.
