Even though water covers most of the earth's surface, humans spend most of their lives on land and a small portion in the air while they’re sleeping. Float on with this Groupon.

Choose Between Two Options

• $42 for a three-hour dinner cruise aboard the Spirit of Philadelphia, redeemable Sunday–Thursday (up to an $88.31 value)
$50 for a three-hour dinner cruise aboard the Spirit of Philadelphia, redeemable Friday or Saturday (up to a $99.03 value)

During a three-hour cruise, guests take in views of Philadelphia's historic skyline from an expansive open-air deck before being escorted to a table, where they can feast on a dinner buffet equipped with a carving station and enticing desserts. During meals, Spirit's talented staff serenade guests with renditions of popular songs before a DJ encourages dancing on a newly renovated dance floor by spinning beat-heavy tracks amid LED lights and plasma TVs. Boarding begins at 6:30 p.m. Monday through Thursday, 7 p.m. on Friday and Saturday, and 4:30 p.m. on Sunday.

Entertainment Cruises

Pop melodies and melodious strains of music spill out onto shimmering waters during excursions from Entertainment Cruises. The vocal harmonies don't come from performers on stage, but rather from a staff of musically trained waiters. During waterfront tours, waiters entertain passengers as they drift by scenic and historic sights. The year-round schedule encompasses daytime, sunset, and moonlight trips, as well as seasonal themed cruises.

Though Spirit of Philadelphia sometimes features a discounted price online, this Groupon still offers the best deal available.