3. Deep Sea Fishing
It all sounds straight out of Game of Thrones: Charter a sunrise voyage to Devil's Teet in the Farallon Islands. Then fish for elusive giant squid (or salmon or crab) the rest of the day. You might not be on the Mississippi, but the New Huck Finn will float you around in style.
Emeryville Sportfishing (510-654-6040). $105 for giant squid charters, $1,100 and up for private charters here