Why should you go there and how do you do it right?

The real reason for the journey is the light. Deep inside this limestone cave, north of Phetchaburi and about an hour from Hua Hin, beams of light stream through openings in the rock ceiling, illuminating a reclining Buddha and the shrines and stupas surrounding him. Many turn back halfway. Don't. In the innermost chamber, the light channel unfolds its full effect—and that is precisely the real reason for the trip.

From the parking lot, it's about 80 meters to the entrance, then a steep stone staircase leads down. Bats gather near the cave entrance and their numbers dwindle as you venture deeper into the cave. This can be unsettling for first-time visitors for about a minute. Since there aren't many visitors, you can linger there in peace for a while. Monks sell amulets inside, and there's also a monk on site if you'd like a blessing. The cool, stony air makes a visit a welcome respite on a sweltering afternoon.