About 5 years ago, my family and I visited Assateague Island in Delaware/Maryland while on vacation.  This is a wonderful place.  The beaches are clean.  There was enough surf to have fun without feeling endangered.  If you're into camping, that's available as well.  And there are horses.  "Wild"  horses.

There's a reason I put the quotes around the word wild above.  The rules are that you are supposed to keep away from the horses and let them do their thing.  Don't feed them.  Don't go up and pet them or scare them or try to ride them.  On the other hand, the horses are free to ignore the rules.  The are around people all the time and are totally acclimated.  This means you can get fairly close enough for some good photos.  Here's one of mine.

The horses on Assateague Island are "wild," meaning that people are supposed to leave them alone. However, they are so used to people that they'll wander through campgrounds and anywhere else they want. They usually avoid the beaches, but when I was there it was so hot and the mosquitos on the other side of the island were so voracious that they decided to hit the beach.

I love the mane on this one.