Planetside the makers of Terragen:The home of Terragen - photorealistic scenery rendering software.
3D Landscapes of Alex: Sunrise and sunset scenes, water landscapes, sea view, and mountains rendered in Terragen.
Alan Palmer Terragen: Contains several galleries of realistic and fantastic landscapes.
Cresswell Graphics Terragen Gallery: Landscapes and seascapes created by Pam Cresswell.
Gallimaufry: Gallery of landscapes and mountains in 0.7 version. Includes several Bryce galleries as well.
JRS's Terragen Index: Contains several galleries of land and sea panoramas.
Kees's Terragen: Landscape images, free to use as wallpapers, and movies.
MQ Creations: Gallery with sea and lava scenes.
TerraCon Revolution: Monthly contest, galleries, and forum.
TerraEscape: Terragen and Bryce generated landscapes by Armands Auseklis, some of them post-processed in Photoshop.
TerraNet - Virtual Worlds by Terragen: Collection of snowy landscape and seascapes scenes, in high-resolution 1024x768 can be used as wallpapers.
TerraWest: Images done with 0.7 and 0.8 versions of the program, tutorials, and links.
TumTum: Terragen rendered atmospheric landscape galleries, animation, and photography.
Turx.com: Ensar Yanar's collection of landscapes, abstractions and models. In English and Turkish.