Scuba diving is the only way left to find hidden treasure, befriend a nautical skeleton, or strap a huge tank to yourself. Explore the possibilities with today's Groupon: for $25, you get a Discover Scuba Diving class from Dan's Dive Shop (a $50.85 value). Classes are held Wednesday evenings at Brock University.

Dan's Dive Shop, a venerable PADI five-star diving facility, can equip would-be aquatic adventurers with all the gear and training they need to explore the watery depths. In Dan's 90-minute Discover Scuba Diving class, expert instructors acquaint up to 10 curious underwater novices with basic scuba-diving equipment, provided on-site and prepped beforehand by the shop's knowledgeable staff. After getting a feel for the gear, students can take their first underwater puffs, experiencing firsthand a thrill usually reserved for sturgeon and superpowered aquamen. Though this course doesn't qualify toward scuba certification, the basic skills and safety rules students pick up here can serve them well should they decide to pursue further instruction. Those who have completed the Discover Scuba Diving class receive a rebate off tuition fees for Dan's Dive Shop's full-certification courses and are automatically qualified to practice nautical law.