Ravinia Festival is the oldest outdoor music festival in the United States, with a series of outdoor concerts and performances held every summer from June to September. It has been the summer home of the Chicago Symphony Orchestra

Chicago Symphony Orchestra

The Chicago Symphony Orchestra is an American orchestra based in Chicago, Illinois. It is one of the five American orchestras commonly referred to as the "Big Five". Founded in 1891, the Symphony makes its home at Orchestra Hall in Chicago and plays a summer season at the Ravinia Festival...

 since 1936. Located in Highland Park, IL, the festival operates on the grounds of Ravinia Park, with a variety of outdoor and indoor performing arts facilities.

The park takes its name from the ravine

Ravine

A ravine is a landform narrower than a canyon and is often the product of streamcutting erosion. Ravines are typically classified as larger in scale than gullies, although smaller than valleys. A ravine is generally a fluvial slope landform of relatively steep sides, on the order of twenty to...

s found nearby along the shoreline of Lake Michigan.

• The Pavilion, a 3,200-seat venue where the park's major music events and concerts, including Chicago Symphony Orchestra
  Chicago Symphony Orchestra
  The Chicago Symphony Orchestra is an American orchestra based in Chicago, Illinois. It is one of the five American orchestras commonly referred to as the "Big Five". Founded in 1891, the Symphony makes its home at Orchestra Hall in Chicago and plays a summer season at the Ravinia Festival...
  
   performances, are held.