The natural thermal water springs in Bulgaria are some of the most sterling and unique resources of the country; they are the “golden key“ to boosting the development of the hospitality industry that will keep tourism flourishing. Over 800 hydro mineral springs clustered in over 240 water formations, rich in hot and cold mineral water with temperature varying in a wide range from 37° C up to 101° C, gush forth and spout out of the bowels of the Earth from a depth of over 2000 meters.
The Complete Encyclopedia of Minerals: Description of Over 600 Minerals from Around the World
Encyclopedia of Minerals is a book for all people interested in the beautiful world of minerals. They can find here hundreds of photographs of beautiful crystals and crystal aggregates, together with a list of classic and new occurrences for each mineral species. Minerals are arranged into chapters according to the mineral system.
