Horton Plains National Park is home to endemic species found nowhere else on Earth, including the purple-faced langur, the Sri Lankan leopard, the sambar deer and an array of highland birds. The famous trekking circuit leads through the park’s eerie cloud forests, past the glassy Chimney Pool, through sweeping grasslands dotted with endemic wildflowers and past the serene Baker’s Falls, a picturesque cascade tumbling through the jungle – before arriving at the edge of the world at World’s End. Here, the plateau drops away in an almost vertical 870-metre cliff into the distant plains below – a view of incomprehensible scale that, when the morning mist lifts to reveal it, delivers one of travel’s most genuinely jaw-dropping moments.