Shore Leave Planet The Shore Leave Planet , also known as the Amusement Park Planet , was an uninhabited planet in the Omicron Delta region . Set up as an amusement park of sorts by an unknown race , as of the late 2260s , it had operated for aeons and served the crews of many ships . Starfleet first became aware of the planet when the encountered it in 2267 . They found the planet to be lush and beautiful with forests , water , and mountains , – and entirely artificial . The atmosphere was capable of supporting humanoid lifeforms . Constructed by an unidentified race , the planet ' s idyllic surface concealed a vast factory . Likened to an amusement park , the planet used small antennae to scan the thoughts of visitors . The information thus obtained was used to construct artifacts to implement the fantasies of those visitors ; once completed , the artifacts were deposited on the surface , somewhere near the individual whose fantasies they represented . These artifacts could be almost anything ; they ranged from a small 20th century firearm to animal s , plant s , aircraft , and people . Animated objects , such as people , behaved exactly as their fantasist expected them to behave . Kirk enjoyed a ferocious fight with , an old Academy tormentor , and later a rekindled romance with an old flame , . There was evidence that the artifacts were pre - programmed , and also that the planet could alter their programming after their manufacture ; in one case , an existing aircraft strafed two crewmembers immediately after it occurred to one of them that it might take this action . Disabled artifacts , and artifacts whose purpose was ended , disappeared quickly ; presumably , they were returned to the underground facility where they had been made . The artifacts could be dangerous if the fantasy they were part of was dangerous . In two cases , " Enterprise " crew were seriously injured ( at the time , they were believed killed ) . When this happened , the injured were taken to the complex below , where their injuries were repaired . The " Enterprise " crew briefly met one representative of this race , the Keeper , who advised them that his people constructed the planet as a place where they could come , and play . Hikaru Sulu did not believe such an advanced race could possibly need to play , but Kirk opined that " the more complex the mind , the greater the need for the simplicity of play , " a statement the Keeper agreed with . The Keeper would not discuss his race , explaining simply that the Federation visitors weren ' t yet ready to understand them . ( ) In much need for R & R , the " Enterprise " visited the planet a second time in 2269 . The ship ' s crew learned that the Keeper , an elderly man at the time they originally met him , had died . They also became embroiled in the schemes of the planetary master computer . This extremely sophisticated intelligence had grown disenchanted with its life of servitude . Charged by its builders with scanning the minds of visitors , and manufacturing their fantasies , it wanted more . To achieve its goals , it imperiled a number of " Enterprise " crew , and ultimately kidnapped Lieutenant Uhura . After several discussions with her , it eventually embraced a modified worldview , and released the threatened crew members . ( ) Operation . The " planetary effects " were operated by a thought - duplicator master computer capable of reading thoughts , located in a computer center within an underground complex . This complex , which was believed to also contain the Keeper ' s quarters , was shielded by a solid planetary shell consisting of granite and metal alloy impenetrable by Starfleet sensors . At at least some points , the shell was located barely under the surface . There were many entrances to the planet interior , through which the computer delivered the robot characters to the surface . ( ) Appendices . Background information . In the scene descriptions from the final draft script of " Shore Leave " , the first view of this planet was described thus ; " " Park - like . . . forest and meadows . . . no structure , people or animals . . . many flowers . . . extremely peaceful . " " The script detailed a glade on the planet ' s surface as " " surpassing anything we ' ve seen thus far . " " In the scripted version of his captain ' s log from " Shore Leave " , Kirk described this world as " " an uninhabited planet in the Omicron Delta region . . . earth type . . . apparently uninhabited . . . , " " whereas in the final version of that log entry , he refers to it as " " an uninhabited planet in the Omicron Delta region . A planet remarkably like Earth , or how we remember Earth to be . Park - like , beautiful , green , flowers , trees , green lawn , quiet and restful . Almost too good to be true . " " An initial Starfleet visit to the Shore Leave Planet was considered for the episode , but this did not come to pass , due to the planet being new to Starfleet in the episode " Shore Leave " ; the planet was ultimately replaced by Risa in the ENT episode . ( ) Apocrypha . In the novelization of " Once Upon a Planet " , a continuation after the events of the actual episode depicted some of the leisure time spent by " Enterprise " crew members on the planet . The planet not only featured in that adaptation but also in the novelization of ( which , in " Star Trek Log 3 " , follows " Once Upon a Planet " and was set immediately after it ) . The latter adaptation referred to the planet upon saying that a party had by the " Enterprise " s bridge crew ( under the influence of love potion crystal s ) was insisted by some of the celebrators as being even better than their recent stay on the planet .