The mountain massif itself consists of multiple peaks. The Indus passes gigantic gorges deep near the Nanga Parbat massif. Kangchenjunga and its satellite peaks form a huge mountain massif. Bassenthwaite Lake occupies the valley between this massif and the North Western Fells. The Dead Cities are situated in an elevated area of limestone known as Limestone Massif. It forms the southernmost part of the Maladeta massif. The closest mountain range is the Khao Khiao Massif, about southeast of the city. The Watzmann is the third highest mountain massif in Germany. It is a part of the Rhenish Massif ( or Rhenish Slate Mountains). Glaciers no longer exist in the Apennines outside the Gran Sasso d'Italia massif. The historical existence of volcanic activity in the Massif Central is somewhat visually evident. The Mount Meager massif is the most unstable volcanic massif in Canada. The La Colonia Formation is exposed over the southern slope of the North Patagonian Massif. Cavities also form in the marble of the Central Alps and the Bohemian Massif. The Cyclades are part of a metamorphic complex that is known as the Cycladic Massif.