• Underwater
  Underwater
  Underwater is a term describing the realm below the surface of water where the water exists in a natural feature such as an ocean, sea, lake, pond, or river. Three quarters of the planet Earth is covered by water...
  
   environments
• Underground environments
• Microscale environments or smaller
• The "space" contained in the mind
  Mind
  The concept of mind is understood in many different ways by many different traditions, ranging from panpsychism and animism to traditional and organized religious views, as well as secular and materialist philosophies. Most agree that minds are constituted by conscious experience and intelligent...
  
   or the imagination
  Imagination
  Imagination, also called the faculty of imagining, is the ability of forming mental images, sensations and concepts, in a moment when they are not perceived through sight, hearing or other senses...
  
  

Entertainment

• Inner Space (television), a 1974 television underwater documentary series by Ron & Valerie Taylor and narrated by William Shatner
• Innerspace
  Innerspace
  Innerspace is a 1987 science fiction comedy film directed by Joe Dante and produced by Michael Finnell. Steven Spielberg served as executive producer. The film was inspired by the classic 1966 science fiction film Fantastic Voyage. It stars Dennis Quaid, Martin Short, Meg Ryan, Robert Picardo and...
  
  , a 1987 sci-fi comedy film
• Operation: Inner Space
  Operation: Inner Space
  Operation: Inner Space is a PC game released in 1994 by Software Dynamics for Windows computers. The shareware version is a 14-day trial with most features enabled. After 14 days, many of these features are disabled , and the player can only use one ship...
  
  , a 1994 computer game
• InnerSPACE
  InnerSPACE
  InnerSPACE is Space 's leading Sci Fi genre news program holding an average audience of 52,000 during winter January 2010, up 27% from winter January 2009. Not to be confused with the Sci-Fi film Innerspace .-About:...
  
   The 30 minute Canadian television show owned by Space (TV channel)

Places

• Adventure Thru Inner Space
  Adventure Thru Inner Space
  Adventure Thru Inner Space, presented by Monsanto Company, was an attraction in Disneyland's Tomorrowland. It was the first attraction to utilize Disney's Omnimover system....
  
  , a 1967 themepark attraction at Disneyland's Tomorrowland
• Inner Space Center, a center in the University of Rhode Island
• Inner Space Cavern
  Inner Space Cavern
  Inner Space Cavern is a Karst cave located in Georgetown, Texas. The cave was discovered by the Texas Highway Department in 1963 during the construction of Interstate 35...
  
  , a Karst cave in Georgetown, Texas, USA

Music

• Can (album)
  Can (album)
  Can, also known as Inner Space, is the eleventh studio album by Can, released in 1979. Former bassist Holger Czukay's involvement with this album is limited to tape editing...
  
   (a.k.a. Inner Space), a 1979 album by Krautrock band Can
• Inner Space (album), a jazz music compilation album by Chick Corea
  Chick Corea
  Armando Anthony "Chick" Corea is an American jazz pianist, keyboardist, and composer.Many of his compositions are considered jazz standards. As a member of Miles Davis' band in the 1960s, he participated in the birth of the electric jazz fusion movement. In the 1970s he formed Return to Forever...
  
   (recorded in 1966 and 1968)
• "Innerspace", a song by The Apples in Stereo
  The Apples in Stereo
  The Apples in Stereo, styled The Apples in stereo, is an American indie rock band associated with The Elephant Six Collective, a group of bands also including Neutral Milk Hotel and The Olivia Tremor Control. The band is largely a product of lead vocalist/guitarist Robert Schneider, who writes the...
  
   on their album Fun Trick Noisemaker

Other

• A conference of closed circuit rebreather diving and CCR training held annually in the Grand Caymans. http://www.diversalertnetwork.org/News/Article.aspx?newsid=985914 http://www.addhelium.com/events/inner-space.pdf
• Lumen (anatomy)
  Lumen (anatomy)
  A lumen in biology is the inside space of a tubular structure, such as an artery or intestine...
  
  , an inner space, lining, or cavity
• Inner product space
  Inner product space
  In mathematics, an inner product space is a vector space with an additional structure called an inner product. This additional structure associates each pair of vectors in the space with a scalar quantity known as the inner product of the vectors...
  
  , a kind of vector space in linear algebra