While the former shrimping town of Kemah has been converted to an amusement park, crusty Old Seabrook, right across the channel, is still the home port of a small fleet of shrimp boats. Seafood delivery trucks are parked along the streets, waiting to take the fresh catch to Houston. And the glistening, never-been-frozen, heads-on shrimp in the Vietnamese-owned markets along the waterfront are ridiculously cheap. That's why the shrimp dishes at Merlion, a few blocks away, are absolutely transcendental. Merlion is not an exceptional Thai restaurant -- it's a solid Thai restaurant with exceptional seafood dishes. The chef has the good sense not to overcook the shrimp and to buy it fresh every day. And when you combine perfectly cooked seafood with even average Thai curries and garlic chile sauces, you get something very special.