Buchan Caves, Limestone cave system in Victoria, Australia

Buchan Caves is a limestone cave group in East Gippsland, Victoria, with six entrances and a total length of 3 to 4 kilometres. The Royal Cave and Fairy Cave are lit and have walkways. The caves contain stalactites, stalagmites, and calcite-rimmed pools, as seen in photographs of pale grey formations and a dark pool.

The Buchan Caves Limestone was laid down about 410–393 million years ago in the Devonian Emsian stage, when a sea rich in shellfish and coral covered East Gippsland; the caves formed by solution of this rock. In 1840 Stewart Ryrie Jr entered a cave, possibly 'the Garage', during a survey. In 1887 the area was reserved on geologist Albert Ernest Kitson's recommendation. Frank Moon reported on Fairy Cave in 1907, and Royal Cave, mapped by Frederick Wilson in 1910, opened in 1913.

The caves lie within the Buchan Caves Reserve, which has been transferred back to the Gunaikurnai Nation and is jointly managed with the state. The Gunaikurnai are the traditional and current custodians of the caves and their surroundings. The reserve was set out and planted mostly in the late 1930s.

Daily guided tours run in Royal Cave and Fairy Cave; both are lit and fitted with walkways, and the temperature stays at 17 °C year-round. Expect uneven ground and stairs along the underground passages. The reserve also has short and long bushland walks, campsites, cabins, a picnic ground, a playground and an information centre.

The caves were made a reserve almost by accident in 1887, when the land they lie on had been set aside for stock camping. On the geologist Albert Ernest Kitson's recommendation the area was then reserved to protect the caves.