Near Laudat next to Titou Gorge in the Roseau Valley, the hiking trek to Boiling Lake is a strenuous 6 hour adventure. It is one of the most difficult trails on Dominica and crosses very challening terrain. This well-maintained trail begins at approximately 1,600 ft (490 metres), where a level stretch of rocky pathway blends alternately with wooden steps. But don't be fooled by the flat beginningit grows steeper. Although this is a strenuous trail, the trip is among the best ways to experience the rainforest of the Caribbeans Nature Island. See and hear rainforest birds and other rare tropical animals while truly experiencing the heart of the island. The wet rain forest is crossed by rising gradually from 540m to 690m then goes down 30m toward the Trois Pitons River, also known as Breakfast because it is usually the first rest stop. An hour is needed to reach this river. After this first stop, the path follows a ridge. One passes gradually from the rain forest to the mountain forest. An hour after the river, one arrives at the highest point, 900m, which offers a panoramic view over all the central zone of the park. Some metres farther down, to the right, is a side trail to Wotten Waven. By going to the left, one reaches the Valley of the Desolation. The region known as the Valley of Desolation, which was once a lush forested area, now appears to be devoid of life. The floor of the valley is covered in a dense mat of mosses and lichens, and scattered below are grasses and the yellow-and-white flowered Bromeliad, Pitcairnia spicata var. sulpurea. The valley is followed for 30 minutes on the right bank, then, passing to the left bank, one turns off to the northeast reaching the Boiling Lake in a further 30 minutes. This is the worlds largest boiling lake. The Boiling Lake appears like a cauldron of bubbling grayish-blue water that is usually enveloped in a cloud of vapour. The lake is approximately 200ft (63m) across and its present depth is unknown. The sides of the lake are a mixture of clay, pumice and small stones. The Boiling Lake is a flooded fumarole, a crack through which gases escape from the molten lava below, rather than a volcanic crater. The natural basin of Boiling Lake collects the rainfall from the surrounding hills and from two small streams which empty into the lake. The water seeps through the porous bottom to the hot lava below where it is trapped and heated to boiling point. This trail is the most spectacular in Dominica. It combines rain forest and mountain forest before crossing the bleak Valley of Desolation and reaching the spectacular Boiling Lake. Do not attempt this difficult trail without a local guide.