‘Souvenirs From the Silurian Sea: Fossils of Will County’
Event information
Date: Wednesday, September 3, 2025
Time: 10:00 a.m. to 4:00 p.m.
Fee: Free!
Age: All ages.
Contact: 815-722-9301
Location: Isle a la Cache Museum

Event details
This ongoing program runs from Wednesday, Sept. 3, to Sunday, Nov. 30. Hours are 10 a.m. to 4 p.m. Wednesdays to Sundays.
Greetings from Isle a la Cache, where you will time travel for a prehistoric adventure! Hundreds of millions of years ago, our area was covered by a shallow sea. Discover the wildlife that called Will County home and view these creatures from the past through the souvenirs they left us — fossils.
“Souvenirs From the Silurian Sea” is a naturalist-created exhibit that leaves visitors with an experience to write home about — a rare chance to see fossils from the Isle a la Cache Museum collection and a deeper dive into life before us. This exhibit was made possible by The Nature Foundation of Will County.
Event requirements
No registration required.
Isle a la Cache Museum is an accessible facility. Anyone who requires an auxiliary aid or service to participate in this program should submit a request online no later than 48 hours before the program.