Perhaps it is just New England, but that is unlikely for I have see few shorelines except those of New England with the exception of the green marshes in New Jersey.
Perhaps it is the long coastlines: Rhode Island, where I grew up, seems nothing but coastline and a famous one at that.
Variety is of course a cliche, but variety there is from a thousand different variables.
Drives to northern Maine must include several stops along the coast and that is a wonderland all its own (not to mention “Wonderland” in Acadia National Park).
Tides surely wait for no man, but they are reliable and variable. Normal high and low tides, king tides and storm surges all make their contributions.