Dângrêk Mountains, Mountain range between Thailand and Cambodia.
The Dângrêk Mountains form a long ridge spanning roughly 300 kilometers from east to west, built from sandstone and siltstone layers with vertical cliffs on the southern face. The northern side slopes more gently toward Thailand, while the southern side drops sharply toward the Cambodian plains.
The range formed through ancient geological uplift and has served as a natural boundary for many centuries between the lowlands on either side. During the late 1970s, it became a crucial escape route for refugees fleeing conflict and upheaval in Cambodia.
The range holds remnants of ancient Khmer settlements, with carved stones and temple foundations scattered along its ridges that speak to past occupation.
The main crossing point through the range is the O Smach pass, which connects northwestern Cambodia to Thailand's plateau region. Travelers should prepare for steep terrain and weather that changes with the seasons.
The range creates a natural amphitheater shape with gradual slopes facing Thailand and sudden cliffs facing Cambodia, a dramatic contrast that reveals the geological forces that shaped the region. This asymmetrical profile developed because erosion worked differently on each side.
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