Khao Sam Roi Yot, literally translated as "Mountains with 300 Peaks," is beautifully situated on Thailand's Gulf Coast 240 km (150 miles) southwest of Bangkok. Though this magnificent park of beaches, caves and rugged hills is well known to locals and road trippers, it remains relatively unexplored by the bulk of the country's transient, vacationing population. Don't let this be your mistake as well.
The Indiana Jones-esque Phraya Nakhon Cave is far and away Khao Sam's biggest draw, with its telltale shrine drenched in angelic sunlight from a collapsed sinkhole opening above. This alone is worth the journey, and the photos should cause a few jaws to drop back home. There are, of course, a host of other caves to explore as well (see Sai Cave), along with some great climbing and hiking options for those who want to take in the park's incredible panoramic scenery from above.
Feel like pitching a tent beneath the stars? Secluded beaches like Sam Phraya are a perfect place to experience some rare Thai coastal tranquility, though bungalows are available further inland if that's more your style. Just don't cut yourself short. To really experience all that this beautiful area has to offer you'll definitely want to spend a couple days here.