Before the invention of Lake Michigan, Chicagoans were forced to take their speedboats to the local YMCA and do nanosecond laps, or they went to the nearest kiddie pool for donuts. Celebrate this magnificent liquid innovation with today’s Groupon to Seadog Cruises. Choose from the following options:

• For $13, you get a 30-minute Seadog Chicago Speedboat Lake Tour (up to a $25.94 value).
• For $18, you get a 30-minute Seadog Extreme Thrill Ride (up to a $36.11 value).
• For $19, you get a 75-minute Seadog Chicago River & Lake Architecture Tour (up to a $37.24 value).

Embark on any Seadog Cruise from the south side of Navy Pier, a Chicago entertainment staple along Lake Michigan, to see a variety of iconic sites. The 75-minute architectural tour lets waternauts smoothly ride the river’s undulating waves while a knowledgeable guide points out the city’s beautiful landmarks and sites, including the John Hancock Center, the Willis (formerly Sears) Tower, the Tribune Tower, and the Wrigley Building.

Or, amp up the sightseeing with a 30-minute speedboat lake tour and zoom along, below, and above the water while racing from Navy Pier toward Museum Campus. Tour takers will be able to enjoy Chicago’s skyline, as well as the informative narration from the mouth of the sea captain.

Adventure seekers craving even more excitement should opt for the 30-minute thrill ride employing the jet-propelled Seadog Extreme vessel, which accelerates 30% faster than other Seadog boats and reaches 45 mph. Mastering 180- to 360-degree spins, the exhilarating splashfest takes riders on a high-speed ride, all to the sweet soundtrack of heart-clenching rock ‘n’ roll music, turbo-charged engines, and fun Chicago factoids.

A Seadog tour is a once-in-an-hour opportunity to show out-of-town guests the city, as well as a way for Chicagoans to enjoy the lake that doesn’t involve grenade fishing. Be sure to check the website for each adventure’s specific schedule and availability.