Cappadocia, Turkey (01 of20)
Open Image ModalAncient rock houses intermingled with modern houses in Cappadocia, Turkey. (credit:Flickr:Alaskan Dude)
Cappadocia, Turkey(02 of20)
Open Image ModalRock houses and Fairy Chimneys near Goreme where valleys of cascading cliffs, and labyrinthine underground cities, Cappadocia is outer space as it might have been imagined by Jim Henson: picturesque and endearing. (credit:Flickr:Alaskan Dude)
Cappadocia, Turkey(03 of20)
Open Image ModalUndulating patterns in the Cappadocia landscape. (credit:Flickr:Alaskan Dude)
Valle de la Luna (Valley of the Moon), Chile(04 of20)
Open Image ModalBuzz Aldrin could have been talking about Chile's Valle de la Luna when he described the moon's 'magnificent desolation'. (credit:Flickr:Phillie Casablanca)
Valle de la Luna (Valley of the Moon)(05 of20)
Open Image ModalStrange lunar landforms eroded by eons of wild weather crowd the horizon; bleak dunes and distant volcanoes amp up the surreality. (credit:Flickr:Phillie Casablanca)
Lake near Myvatn, Iceland(06 of20)
Open Image ModalLake near Myvatn, Iceland(07 of20)
Open Image ModalDotted with dramatic steaming fumaroles, bubbling mudpots, weird rock formations and lava fields, Iceland is a sci-film waiting to happen. (credit:Flickr:sly06)
Canyonlands, Utah(08 of20)
Open Image ModalCanyonlands, Utah(09 of20)
Open Image ModalTouch down in high summer for that extra blast of Martian intensity. (credit:Flickr:Bitterroot)
Salar de Uyuni, Bolivia(10 of20)
Open Image ModalThis immense, shimmering sea of salt will haunt daydreams for years to come. (credit:Flickr:gringaespanola)
Arbol de Piedra, Bolivia(11 of20)
Open Image ModalThis volcanic rock formation in Desierto Siloli resembles a lone tree set in a sea of sand. (credit:Flickr:Phillie Casablanca)
Lanzarote, Canary Islands(12 of20)
Open Image ModalThe extraordinary volcanic moonscape of central Lanzarote would make Armstrong and Aldrin feel right at home. (credit:Flickr:sbegueria)
Lanzarote, Canary Islands(13 of20)
Open Image ModalThe glowing green waters of El Golfo Crater might even tempt them to shrug off those cumbersome spacesuits and go for a paddle. (credit:Flickr:sbegueria)
Nazca Lines, Peru(14 of20)
Open Image ModalDeep in desolate desert, and only visible from the airOne of Peru's most impressive and enigmatic sights, the mysterious Nazca Lines could easily be mistaken for the doodlings of ancient astronauts. (credit:Flickr:funkz)
Nasca Lines, Peru(15 of20)
Open Image Modal (credit:Flickr:Christian Haugen)
Great Barrier Reef, Australia(16 of20)
Open Image ModalThe shot from space only hints at the alien landscape awaiting under the water's surface. (credit:Flickr:eutrophication&hypoxia)
Great Barrier Reef, Australia(17 of20)
Open Image Modal (credit:Flickr:Sarah_Ackerman)
Great Barrier Reef, Australia(18 of20)
Open Image ModalPlunge beneath the waves into the technicolour parallel universe that is the Great Barrier Reef. (credit:Flickr:babasteve)
Nubra Valley, Ladakh, India(19 of20)
Open Image ModalSometimes known as 'Moonland', Ladakh is bound by mountains and comprised of mountains. (credit:Flickr:stevehicks)
Nubra Valley, Ladakh, India(20 of20)
Open Image ModalHuman habitation is sparse, and during the wild winter months, the region is only marginally easier to reach than the moon itself. The imposing, inhospitable Nubra Valley is its wild lunar heart. (credit:Flickr:stevehicks)