Start your summer with a trip to Spiro Mounds Archaeological Center for a special guided tour on the summer solstice, Tuesday, June 21. There will be three walks led by archaeologist Dennis Peterson starting at 11 a.m., 2 p.m. and 7 p.m. Each walk will include one mile of easy walking and last about two hours.

Peterson will talk about the history of the mound site and the American Indians who built it more than 1,000 years ago. He also will talk about the reasons for the mounds and the alignment of some of the mounds to track the movement of the sun throughout the year. Peterson will tell the history of the excavations of the site by both archaeologists and looters. The 7 p.m. walk will allow the observation of twilight wildlife and a view of the sunset, which is the most important part of the event.

There is a small fee for this series of tours of $5 for adults and $3 for children in addition to the regular daily admission fee. Oklahoma Historical Society and Spiro Mounds Development Association members do not pay the daily admission fee. No reservations are required, except for large groups. Payment can be made by cash or check, but credit cards are not accepted.