Forest

A forest was an area with a large number of trees. Rivers were the only body of water in forests. (TV: The Doctor's Wife) Vashta Nerada usually lived in forests. (TV: Forest of the Dead) Forests located in hot climates were generally known as jungles.

Forests on Earth

 * Blackdown Woods (TV: Human Nature)
 * Forest of Fear (TV: An Unearthly Child)
 * Oxley Woods (TV: Spearhead from Space)
 * Roundstone Wood (TV: Small Worlds)
 * Sherwood Forest (TV: The Last Oak Tree)

Forests on other planets

 * The Gamma Forests were located on an unnamed planet. (TV: A Good Man Goes to War)
 * In 5345, the Eleventh Doctor, along with Cyril, Lily and Madge Arwell, visited a forest on an unnamed planet. (TV: The Doctor, the Widow and the Wardrobe)