Cape Brett Peninsula is a peninsula

Peninsula

A peninsula is a piece of land that is bordered by water on three sides but connected to mainland. In many Germanic and Celtic languages and also in Baltic, Slavic and Hungarian, peninsulas are called "half-islands"....

 on the northern North Island

North Island

The North Island is one of the two main islands of New Zealand, separated from the much less populous South Island by Cook Strait. The island is in area, making it the world's 14th-largest island...

 coast in New Zealand

New Zealand

New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...

. It is 15 kilometre-long, the head is Cape Brett

Cape Brett

Cape Brett is a promontory on the northern North Island coast in New Zealand. Located at the end of the Cape Brett Peninsula, the head extends north into the Pacific Ocean at the eastern end of the Bay of Islands....

.

A lighthouse stands at the end of the peninsula, which rises to 360 metres at its northern end. A noted landmark, the natural arch ('Hole in the Rock') of Piercy Island

Piercy Island

Piercy Island, often known simply as "The Hole In The Rock”, is located off the north coast of the North Island of New Zealand. It is at the very northern tip of Cape Brett in the Bay of Islands...

, lies about 500 metres off the cape.

A predator proof fence across the peninsula excludes the brushtail possum

Common Brushtail Possum

The Common Brushtail Possum is a nocturnal, semi-arboreal marsupial of the family Phalangeridae, it is native to Australia, and the largest of the possums.Like most possums, the Common Brushtail is nocturnal...

, an introduced animal pest, which feeds on the pōhutukawa

Pohutukawa

The Pōhutukawa is a coastal evergreen tree in the myrtle family, Myrtaceae, that produces a brilliant display of red flowers made up of a mass of stamens. The Pōhutukawa is one of twelve Metrosideros species endemic to New Zealand...

tree to such an extent that the tree can eventually die.