Top Attractions Our Big Events: Hot Air Balloons and the Des Moines Metro Opera Warren County is the Hot Air Balloon capital of the Midwest! The 9-day National Balloon Classic attracts balloonists from around the country and fills the sky with 100+ balloons. The National Balloon Museum displays 200 years of hot air balloon history.We're also home to the renowned Des Moines Metro Opera. "...among the oldest and most enterprising summer opera fests in the nation." - Chicago Tribune The Great Outdoors Come have an adventure in Warren County, where there's plenty of room to roam. There are a lot of outdoor gems here, but a few of the favorites are:Lake Ahquabi State Park - Swimming, Boating, Fishing, Camping, Hiking. 115 Acre Reservoir.Annett Nature Center - Nature Center, Observation Tower, Grass Trails, Prairie, 6-acre Pond, Butterfly garden. 160 Acre park.Great Western Trail - 16.5 miles of multi-use trail from Des Moines to Martensdale. Click here for more parks info. Wineries, Breweries and Distilleries We have more than our fair share of local beverage-makers in Warren County. Visit one of our beautifully-situated wineries for tasting, touring and live music. Or have a glass of whiskey at the award-winning Iowa Distilling Company. Click here for our "drink local" tour. Image courtesy of Two Saints Winery