The four-hour bus journey from Phnom Penh to Sihanoukville along Highway 4 is an interesting one, winding through uplands, rice paddies, and orchards. Once you drive past Phnom Penh's Pochentong Airport and the prestigious Cambodia Golf & Country Club, and on through the area of Kompong Speu, the landscape turns rural, dotted with small villages where a major source of income seems to be the sale of firewood and charcoal.
Somewhere around the entrance to Kirirom National Park all buses stop for refreshments at a roadside restaurant.
The halfway point of the journey lies at the top of the Pich Nil mountain pass, guarded by dozens of colorful spirit houses. These spirit houses were built for the legendary deity Yeah Mao, guardian of Sihanoukville and the coastal region. Legend has it that Yeah Mao was the wife of a village headman who worked in far-off Koh Kong, an island near today's border with Thailand. On a journey to visit him, Yeah Mao died when the boat transporting her sank in a storm—an all-too-believable story to anyone who has taken the boat from Sihanoukville to Koh Kong. Her spirit became the guardian of local villagers and fisherfolk.
At the small town of Chamcar Luang, a side road leads to the renowned smuggling port of Sre Ambel. The main highway threads along Ream National Park, with the Elephant Mountains as a backdrop. The national park is a highlight of Sihanoukville, with its mangroves, forests, waterfalls, and wildlife. The park is, unusually for Cambodia, well protected from the vagaries of modern development. The sprawling Angkor Beer brewery heralds the outskirts of Sihanoukville and the journey's end.