There are multiple factors that can cause a normally pink tongue to turn red. In some instances, the tongue may even take on the appearance of a strawberry with enlarged, red taste buds dotting the surface. Possible causes include: Vitamin deficiencies. Deficiencies of folic acid and vitamin B-12 may cause your tongue to take on a reddish appearance. Geographic tongue. This condition, also known as benign migratory glossitis, is named for the map-like pattern of reddish spots that develop on the surface of the tongue. At times, these patches have a white border around them, and their location on the tongue may shift over time.
Mammoth Cave, the world's longest known cave system. The following is a list of the world's 10 longest caves per length of documented passageways. Many passageways are still being discovered; this list is based on the latest verifiable data.
The canyon is the most famous natural attraction in the USA and possibly in the world. The Grand Canyon is a steep-sided gorge carved by the Colorado River in the U.S. state of Arizona. It is largely contained within the Grand Canyon National Park one of the first national parks in the United States.