Forest

A forest was an area with a large number of trees.

General
Vashta Nerada usually lived in forests. (TV: Forest of the Dead, AUDIO: Night of the Vashta Nerada)

On Earth
On 23 July 1794, the TARDIS materialised in a forest in France. (TV: "A Land of Fear")

Around the 2010s, a global forest, previously the North Forest and Southern Forest, grew overnight to protect the Earth from a solar flare. The forest was able to communicate with Maebh Arden. (TV: In the Forest of the Night)

By the 24th century the west of London, including Perivale, was a forest. (PROSE: The Dimension Riders)

Elsewhere
There were also forests on Earth's moon. (PROSE: Minions of the Moon, Imperial Moon)

There were forests of Cadonwood trees on Gallifrey. (AUDIO: Neverland) Broakirs were game animals which lived in Gallifreyan forests. (PROSE: Blind Fury)

Funworld was once a forest planet, before it was converted to a world-sized funfair by Georgia Donnelly. (AUDIO: Night of the Vashta Nerada) It was home to a large number of Vashta Nerada, who gained a taste for flesh, and wanted revenge on the humanoids who ravaged their planet. (AUDIO: Night of the Vashta Nerada, Day of the Vashta Nerada)

The trees of Cheem were introduced as "the forest of Cheem". (TV: The End of the World)

The forests of Eden were dense even in the small section captured by Tryst's Continuous Event Transmuter. (TV: Nightmare of Eden)

The Gamma Forests were located on a planet. (TV: A Good Man Goes to War)

In 5345, the Eleventh Doctor, along with Cyril, Lily and Madge Arwell, visited a forest on a planet. (TV: The Doctor, the Widow and the Wardrobe)

The section of a pocket universe in which the Eleventh Doctor once got stuck was entirely forest. (TV: Hide)