The geography of Queensland in the north-east of Australia, is varied. It includes tropical islands, sandy beaches, flat river plains that flood after monsoon rains, tracts of rough, elevated terrain, dry deserts, rich agricultural belts and densely populated urban areas.
The total land mass of Queensland covers 22.5% of the Australian continent, an area of 1,730,648 square kilometres, making it the second largest state in the Commonwealth of Australia. The total length of Queensland's mainland coastline is 6,973 km (4,333 mi) with another 6,374 km (3,961 mi) of island coastline. A unique geographical feature of the state is the Great Barrier Reef, an important tourist drawcard. The Tropic of Capricorn crosses the state with about half of Queensland's area located to the north of the line.