inaccessible workings
21Mammoth Cave National Park — Mammoth Cave redirects here. For other uses, see Mammoth Cave (disambiguation). Mammoth Cave National Park IUCN Category II (National Park) The Rotund …
22A New Kind of Science —   Author(s) Stephen Wolfram Country …
23Lake District — The Skiddaw massif, town of Keswick and Derwent Water seen from Walla Crag …
24Harz — Mountains redirects here. For the district of the same name, see Harz (district). Harz Range Country Germany …
25River Don, South Yorkshire — River Don The River Don as it flows past Hillsborough Stadium. Origin Pennines …
26Hans Bethe — Infobox Scientist name = Hans Bethe image width = birth dat = July 2 1906 birth place = Strassburg, Germany residence = United States nationality = Germany United States death date = death date and age|2005|3|6|1906|7|2 death place = Ithaca, New… …
27William Beebe — For the U.S. Army officer and Medal of Honor recipient, see William Sully Beebe. William Beebe William Beebe in British Guiana in 1917 …
28Umbra (World of Darkness) — For other uses, see Umbra (disambiguation). World of Darkness Old World Mage Umbra Traditions Technocracy Marauders Nephandi New World Mage Paths Orders Other Mind s Eye Theatre This box …
29Central Otago Gold Rush — …
30Parys Mountain — Elevation 147 m (482 ft) …
