Hathaway's Pond, Massachusetts

Part of the Cape Cod watershed, the 20-acre (8-hectare) Hathaway's Pond in Barnstable, Massachusetts, is considered one of the best training sites in New England. Visitors can park near the water's edge and depths are suitable for recreational divers. Underwater, divers will find a 1985 Saab, a 38-foot cabin cruiser and a dive platform.

Depths to: 57 feet (17 m)
Visibility: 5-25 feet (1.5-7.5 m)
Water temperature: Up to 84 degrees Fahrenheit (29 degrees Celsius) at the surface during the summer.

Aquatic life: Include yellow perch, trout, smallmouth bass, pumpkinseed sunfish and banded killifish.
Fees: $7 daily parking fee. Annual passes are available. Visit www.town.barnstable.ma.us.
On-site amenities: Includes a beach and children's playground.
More info: Call (508) 790-6345. Also, a good map of the lake and its depths is available at www.mass.gov/dfwele/dfw/habitat/maps/ponds/pdf/dfwhath.pdf. Another map is available at http://www.capecodbikeguide.com/hathaway_map.asp.

Open: Year-round.

Getting there: Hathaway's Pond is about 1.5 miles southeast of the Route 6/Route 132 interchange, and east of Wequaquet Lake. From Route 6, take Exit 6 onto Route 132 south. At the Phinneys Lane stoplight, take a left and proceed 0.4 miles. The access road to the town beach is on the left.