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:
79°19'3.306"W 43°7'4.013"N
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...
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.