Some of the things that I have found in my area are:
Horseback Riding Lessons
Conservation & Wildlife Rehabilitation Centers
Zoo Classes for Homeschoolers
Library (our local Children's Librarian is an Angel for this homeschool mom)
Local Church Children's Activities
Indoor Play Places....
And really the list could go on and on. Some of these activities are only for the school age kids, others we can all go and enjoy a day/activity out of the house.
We are a part of a local group of homeschoolers who meet a couple times a month for activities such as gym days, field trips, "class parties" (Christmas, Valentines, etc), Spelling Bees, Science and History Fairs and a Mom's Encouragement Night (which is very important!). Calling the local library, searching through Facebook for homeschool groups and talking to other homeschool moms is where I have found all.the.things. We start our school year next Monday and we already have weekly horseback riding lessons, a monthly writing workshop, weekly art classes, bi-weekly Martial Arts lessons and three field trips on the calendar.
I have found for me, and my family, that the balance of getting out and doing, exploring, having extra classes or just playing in the local creek; coupled with the book-work of sitting at the table is one of the joys of homeschooling. Taking the time to listen to these explorers of mine and answer the call of their restless hearts to get out and see and play has so much value; this is how they learn, about themselves and about the world around them.