Newark Earthworks, Ohio
Even though Jill and I were not able to do all the things in Newark that we wanted to do because of time restrictions, I think that they are worth mentioning so that perhaps you could decide to see them:
The Dawes Arboretum It is 1,660 acres with 8 miles of hiking trail or a 4-mile auto tour of gardens and natural areas. There are more than 15,000 living plants, and each season brings a different view. There is also Daweswood House Museum (19th and 20th century antiques, collectibles, and photographs. It was once the Dawes family's country home.
Newark Earthworks, a 2,000-year-old complex that at one time covered 4 square miles. It's the largest geometric earthworks ever created. Remaining are the Great Circle Earthworks, the Wright Earthworks, and the Octagon Earthworks
The National Heisey Glass Museum is a museum in Newark that houses more than 4,500 pieces of glassware produced by the A.H. Heisey & Company in Newark from 1896-1957.
So, if you decide to visit Newark, make sure you have plenty of time to see it all!
The city of Newark Ohio is the site of the most extensive Hopewell earthworks. These earthworks were connected by parallel trenches of up to 3 miles. The great circle is nearly 1200 ft in diameter.
Unfortunately the site is open in the summer only.
These are the most impressive of the earthworks. Unfortunately the earthworks have been turned into a golf course and access is only on a non-interference basis with the golfers.