There is a winery town about an hour from us. There you can go on a "private" tour set aside for anniversary couples. They also have hot air baloon rides where you and your husband can go up in a flight and toast each other with wine or other sparkling beverage. (My wife and I don't drink so we would use sparkling apple cider.)
We took a gondola ride (think Venice, Italy type) in Newport Beach Harbor.
Go to groupon on the internet and see what kinds of things they offer. It will give you ideas. My wife and went to Hawaii for our 25th anniversary and we have done something every year for our anniversary. One year I'll plan it and the next year my wife will plan it.
Congratulations on your anniversary ! ! ! (Which one is it for you?) I hope you have a wonderful time! Good luck to you and yours.