Things to Do in Michigan City

Mudderland transmutes one of the Midwest's largest motocross tracks into a swampy test of endurance, challenging thrill-seekers across 3.5 miles of military-style obstacles. Unfurled across the site of a WWII munitions factory, the one-day, full-body assault sends participants running, climbing, and crawling through a lineup of natural barriers, including a 19-foot concrete wall that sprouted from a radioactive apple seed during the 1940s. As limbs splash through ponds, slither through tunnels, and flail wildly while soaring down monstrous slip and slides, spectators bask in the muddy melee from elevated bleachers and VIP viewing decks. Afterward, fresh water bursts from the course's showers to blast away dirt and reveal each participant's new layer of confidence.

In a shop lined with more than 100 bikes models from all around the world, Upgrade Cycle Works' pro mechanics channel their love of cycling whether they are aligning the frame on an old single speed or fitting guests for a brand new road bike. During the fit process, staffers employ the same computerized system used at the Olympic training center as opposed to tracing your body outline on a large piece of construction paper. Next, they’ll help guests choose from bike brands such as Felt, Masi, and Raleigh, and an in-store selection of rides that includes road bikes, single speeds, and hybrids.

In Upgrade's workshop, pro mechanics perform comprehensive tune-ups and repairs, revitalize faded paint jobs, replace punctured wheels, and align frames. The staff also hosts repair clinics to teach cyclists how to fix flat tires and adjust brakes.

Move Your Feet Sports' hour-long lessons teach all ages and abilities to serve and volley like professional bowlers who used to be tennis title holders. Classes for beginners, intermediate players, and advanced players ($25 each) are available at all three facilities. The staff of experienced instructors pump each hour-long lesson full of heart-pounding cardio moves, skill-building exercises, and techniques to crush competition like monster trucks crush hot-dog carts. Look under the Groupon tab on Move Your Feet Sports' registration page to see class options.

Members of the Chicago Academy of Sciences first met in 1857, gathering at the original Peggy Notebaert Nature Museum to share their passion for education and the natural world. Though their meetingplace and library was burnt down in the Great Chicago Fire, their commitment to natural science stood strong. By 1894, the Academy had regrouped and rebuilt their collection in Lincoln Park, using dioramas filled with flora and fauna to create an interactive learning experience.

Today, the museum welcomes guests on a 6.35-acre campus opened in 1999 and filled with exhibits that expand the relationship between the public and nature. In addition to more than 15,000 plant specimens and 22,000 amphibians and reptiles, a wilderness walk takes guests through Midwestern environments, including praries, savannahs, and dunes, all filled with living and preserved animals. Visitors can touch live wildlife from Illinois wetlands and stand in a swirl of 1,000 exotic butterflies and birds in the Judy Istock Butterfly Haven and tropical greenhouse. Outdoor exhibits demonstrate the power of energy-efficient technology with 17,000 square feet of green roofs, the compost coral, rain-barrel ranch, and the restored native prairie made completely out of recycled soda cans.

During the four one-hour tennis lessons, you'll learn the basics of tennis from one of XS Tennis's instructors, each an experienced professional. Master the art of the backhand, draw power and sustenance from the strength of the serve, or unravel the allure of the mysterious drop shot, all while getting exercise that doesn't involve hitting a bag of potato chips with a hammer. The lessons are group lessons, giving students the chance to make new friends or potential athletic rivals between grunts and fault-fueled arguments. Customers can apply the value of this Groupon toward an upgrade to another XS Tennis class or lesson and just pay the difference directly to XS Tennis.

The Chicago White Sox have some truly dedicated fans. In 1994, the team decided to reach out to the youngsters who worshipped their footwear. They sought to provide kids with the same conditioning and training they honed their skills with, so they started a sports-training summer camp. In a mere seven years, demand for the trainers' services necessitated that the program conduct year-round sessions in all types of sports, and the Bulls/Sox Academy was born.

Taught by the trainers who spend their life making sure that the Sox and Bulls are ready to hit the field or court, Bulls/Sox Academy's lessons bring professional techniques to aspiring athletes. Baseball programs teach functional speed movements for high-speed base stealing and help kids build the upper-body strength to knock balls out of the park and through the windshield of their least favorite neighbor's minivan. The basketball course divvies up training between shooting, skills, and defensive play. The fast-pitch softball teachers—both former professional players and longtime coaches—arm students to beat back high-velocity pitches without hurting the ball's feelings.