Kauai is known for lots of things: the most beautiful beaches in the state, the magnificent Na Pali Cliffs jutting into the ocean, the incredible rainforests, and the wide panoramas of the Waimea Canyon, but it is not known for a vibrant nightlife. This is a rural island, where work stops when the sun goes down and people go to bed early. There are a few nightlife options, but you pretty much have to search them out and be ready to blend into the island-style options.

It Begins with Sunset...

A must-do on your Kauai vacation -- take the time every day to stop and enjoy the sunset. You can watch the big yellow ball descend slowly into the blue waters of the Pacific anywhere, from Poipu to Polihale State Park to Kee Beach to the entire Na Pali Coast. Some insist on viewing the sunset with a locally made tropical mai tai. The entire day can be built around the sunset -- shopping for the mai tai ingredients, checking the angle of the sun, and swimming with the knowledge that your big, salty thirst will soon be quenched with a tall, homemade mai tai on one of the world's best beaches. When the sun is low, mix the tropical drink with fresh lime juice, fresh lemon juice, fresh orange juice, passion-orange-guava juice, and fresh grapefruit juice, if possible. Pour this concoction on ice in tall, frosty glasses, and then add Meyer's rum, in which Tahitian vanilla beans have been soaking for days. (Add cinnamon if desired, or soak a cinnamon stick with the rum and vanilla beans.) A dash of Angostura bitters, a few drops of Southern Comfort as a float, a sprig of mint, a garnish of fresh lime, and voilà! -- you have a tropical, homemade mai tai, a cross between planter's punch and the classic Trader Vic's mai tai. As the sun sets, lift your glass and savor the moment, the setting, and the first sip -- not a bad way to end the day.

In Hawaii, the mai tai is more than a libation. It's a festive, happy ritual that signals holiday, vacation, or a time of play, not work. Computers and mai tais don't mix. Mai tais and hammocks do. Mai tais and sunsets go hand in hand.

Watch for the Green Flash

If you have been on the island for a few days, you'll notice that people seem to gather outside and watch the sunset. After the sun has set, several people may call out, "Green flash!"

No they haven't had too many mai tais or piña coladas. They are referring to a real, honest-to-God phenomenon that happens after sunset -- there is a "green flash" of light.

The romantic version of the story is that the green flash happens when the sun kisses the ocean good night. (Honeymooners love this version.) The scientific version is not quite as dreamy; it goes something like this: Light bends as it goes around the curve of the earth. When the sun dips beneath the horizon, it is at the far end of the spectrum. So this refraction of the sun's light, coupled with the atmosphere at the extreme angle of the sunset on the horizon, causes only the color green to been seen in the color spectrum just before the light disappears.

Here's how to view the green flash: First, the day has to be clear, with no clouds or haze on the horizon. Keep checking the sun as it drops. (Try not to look directly into the sun; just glance at it to assess its position.) If the conditions are ideal, just as the sun drops into the blue waters a "flash" or laserlike beam of green will shoot out for an instant. That's the flash. May it be with you on your vacation.