A lake was a naturally occurring fixed body of water.
The Doctor and their companions visited many lakes in their travels. On Earth, they visited Lake Garda, (PROSE: Loop the Loup [+]Loading...["Loop the Loup (short story)"]) Lake Geneva, (AUDIO: Mary's Story [+]Loading...["Mary's Story (audio story)"]) Dunstanton Lake, (AUDIO: Prisoners of the Lake [+]Loading...["Prisoners of the Lake (audio story)"]) Lake Silencio, (TV: The Impossible Astronaut [+]Loading...["The Impossible Astronaut (TV story)"]) Lake Vortigern, (TV: Battlefield [+]Loading...["Battlefield (TV story)"]) Loch Ness, (TV: Terror of the Zygons [+]Loading...["Terror of the Zygons (TV story)"]) Nor' Loch (PROSE: The Many Hands [+]Loading...["The Many Hands (novel)"]) and Silent Pool. (TV: The Unicorn and the Wasp [+]Loading...["The Unicorn and the Wasp (TV story)"])
On other planets, they visited Lake Emerson, (PROSE: The Year of Intelligent Tigers [+]Loading...["The Year of Intelligent Tigers (novel)"]) Lake Mono (PROSE: Night of the Humans [+]Loading...["Night of the Humans (novel)"]) and the Lake of Mutations. (TV: The Daleks [+]Loading...["The Daleks (TV story)"]) One planet had a lake infested with crocodiles. (COMIC: The Tests of Trefus [+]Loading...["The Tests of Trefus (comic story)"]) Romana used to visit Lake Abydos in her youth. (AUDIO: Neverland [+]Loading...["Neverland (audio story)"]) An artificial lake was one of the attractions on Hedgewick's World of Wonders. (TV: Nightmare in Silver [+]Loading...["Nightmare in Silver (TV story)"]) The pleasure planet A-Lux had warm artificial lakes. (COMIC: A Cold Day in Hell! [+]Loading...["A Cold Day in Hell! (comic story)"])
Not all lakes were what they seemed. One lake on an unnamed planet was actually Zero's TARDIS. (AUDIO: Spring [+]Loading...["Spring (audio story)"]) Another lake, located on Erratoon, was actually a segment of the Key to Time. (AUDIO: The Prisoner's Dilemma [+]Loading...["The Prisoner's Dilemma (audio story)"])