1. On June 30, 1936, the iconic Chicago theater The Goodman Theatre opened its doors. Since then, it has been a hub for groundbreaking theater productions and community engagement.

2. Illinois officially became a state on December 3, 1818, but it wasn't until June 30, 1835, that the state capital was moved from the frontier town of Vandalia to Springfield. Springfield has been the capital ever since.

3. June 30, 1894, saw the birth of Roy O. Disney, brother of Walt Disney and co-founder of The Walt Disney Company. Although Roy never received the same level of recognition as his famous brother, he played a crucial role in the company's success.

4. The state of Illinois is home to numerous natural wonders, including the Cache River Wetlands. On June 30, 1996, the Cache River became a National Natural Landmark due to its unique ecosystem and the presence of rare and endangered species.

5. On June 30, 1973, the Illinois State Toll Highway Authority opened the final section of the Tri-State Tollway. The 287-mile highway system connects Illinois to Wisconsin and Indiana and has played a vital role in the state's economic development.