Block Island sits about 13 miles south of the Rhode Island mainland, and much of its land is protected from development. Its bluffs, two lighthouses and the sheltered Great Salt Pond make it a favorite stop for sailors.
This Block Island tide clock tracks the tide instead of the hour. Set the hand at high tide and it keeps pace with the roughly 12-hour, 25-minute tidal cycle, so a glance shows whether the water is coming in or going out. The map is laser-engraved into a birch face, and the clock takes one AA battery.
