The Glass House Mountains are a cluster of thirteen volcanic plugs rising abruptly from the flat coastal plain of the Sunshine Coast hinterland, about 75 km north of Brisbane. They are among the most distinctive landforms in Queensland — steep-sided, forest-clad plugs of phonolite and rhyolite, the hardened cores of volcanoes eroded away over millions of years, now standing as isolated towers above surrounding farmland.
Several of the peaks have walking tracks. Mount Ngungun (253 m) is the most accessible serious climb, with a two-hour return walk and good views from the summit. Mount Tibrogargan (364 m) is steeper and requires some scrambling. The Glass House Mountains National Park has several day-use areas and lookouts. The landscape is at its most dramatic in the early morning when mist sometimes fills the valleys between the peaks.