[2] The prominent cliffs with dolerite columns at Cape Raoul were damaged by gunnery practice by warships of the Royal Navy's Australia Station in the late 1800s.

[5][6] At 300 metres (980 ft) above sea level, the columnar dolerite cliffs at Cape Pillar and Tasman Island are among the highest in the world.

[4] Dolerite formations which are more easily viewed from the ocean include Cathedral Rock, Totem Pole, Candlestick, and Tasmans Arch.

Three species of Euphrasia (a semi-parasitic, herbaceous flowering plant commonly known as eyebright) are found only in Tasman National Park.

[4] The park forms part of the South-east Tasmania Important Bird Area, identified as such by BirdLife International because of its importance in the conservation of a range of woodland birds, especially the endangered swift parrot and forty-spotted pardalote.