Raggejavreraige

Raggejavreraige or Råggejávrrerájgge is a cave located in a mountain above the Hellemofjorden in the municipality of Tysfjord in Nordland county, Norway. The cave is located near the lake Råggejávrre, about 2 kilometres (1.2 mi) south of the village of Musken. Råggejávrrerájgge is a limestone cave that has been eroded by this underground river. At 580 metres (1,900 ft) deep, it is the deepest cave in Scandinavia and the only known deep cave north of the Arctic Circle.

Generally, the area is a vast plateau (exceeding an elevation of 700 metres (2,300 ft) above sea level) that is incised by the steep-walled Tysfjorden. Within the impermeable rock, there are three two-dimensional stripes of marble that run from the top of the plateau to below sea level (the fjord is 450 metres or 1,480 feet deep), and continue on the other side. Raggejavreraige is located on the south side of the fjord within the westernmost stripe. In places, the cave occupies the entire width of the marble, which does not exceed 30 metres (98 ft).

Road access to the cave is limited. The nearest road ends at the village of Drag (via Bodø), about 18 kilometres (11 mi) to the north. From Drag, there is scheduled boat service that can be taken to the small village of Musken. Accommodations at the local school and arrangements for trailhead drop-off and pickup by motor-boat can be arranged from Musken. After a stiff hike on a good trail up to an elevation of 600 metres (2,000 ft) the upper entrance area is reached.

Surface water atop the plateau sinks where it encounters the marble, but the accessible entrance to Raggejavreraige ("RJR") is some 100 metres (330 ft) away, a short distance above the shallow valley floor. This entrance is not particularly distinctive, but its strong, inward gust of wind erases any doubt that it is a large cave. The cave consists of about 2 kilometres (1.2 mi) of passages that alternate between steep rifts or shafts and horizontal or low-slope passages.

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Wikipedia