Nova Scotia, where I live now, is bordered on one side by the Bay of Fundy, which has the world's largest tidal distance (the vertical distance that the water recedes between high and low tides). The highest recorded tidal distance in the Bay of Fundy is over 15 meters (45 feet). There are places where, for about a 1-2 hour stretch during low tide, you can actually walk along the bottom of the ocean, all the way across the bay to the land on the other side (I've done it).
There are some really spiffy rock formations that you can see just poking out of the water at high tide, and at low tide they are massive towers of rock, some of which have little caves under them that you can walk around in. It's faboo.

I'll have to dig around a little to find something weird/interesting about my birthplace (Huntington Beach, California).