Irvine is a city in Orange County, California. To the east, Orange County Great Park features an antique carousel and a giant, anchored helium balloon. Visitors can ride the balloon up for aerial views. Trails wind past ancient sycamore trees in Bommer Canyon. The Pretend City Children’s Museum has a kid-size post office, cafe and farm. Impressionist art from around California is displayed at the Irvine Museum.