Cook's Chasm Walkway Near Yachats
Upper Lane County - Florence to Yachats Virtual Tour, Oregon Coast
Walk the wooden, handicapped accessible bridge just north of the official Cook's Chasm, and you'll find yourself overlooking this large crevice, with pathways to the marine gardens surrounding it included at no extra charge (there is a state park fee for parking here).
Here, you'll notice the tide doesn't reach up here - normally. Below: more of this area.