10 Famous Underground Caves in the World
Posted in Landscapes | Tags: cave, caves, limestone, river
photo StrudelMonkey
Caves have been explored throughout history. In prehistory they were used for shelter, burial, or as religious sites. Today researches study caves because they can reveal details of past climatic conditions. Cavers explore them for the enjoyment of the activity or for physical exercise. For the less adventurous, a number of the most beautiful underground caves have been converted into show caves, where artificial lighting, floors, and other aids allow the casual tourist to experience the cave with minimal inconvenience.
10 Spectacular Sea Stacks
Posted in Landscapes | Tags: limestone, rock, rock formation, sea stack
photo arne.list
Sea stacks are amazing vertical rock formations standing in the sea that were formed entirely by wind and water. The formation process usually begins when the sea creates cracks in the headland, causing them to later collapse, and forming free-standing stacks. Eventually, the same process that created the sea stacks will also cause them to collapse.
10 Most Important Rivers in the World
Posted in Landscapes | Tags: ecosystem, river delta, rivers
photo Csizmadia Tam
Rivers have been very useful to men in all parts of the world since prehistoric times. They provide a source of drinking water, for obtaining food, to fertilize lands and way to transport goods from place to place. Rivers also provide an important habitat for wildlife. They play an essential role in the ecology of rainforest and wetlands. A list of the most important rivers in the world.
10 Impact Craters on Earth
Posted in Landscapes | Tags: crater, meteorite
photo Mouser NerdBot
Impact craters are formed when a meteoroid, asteroid or comet crashes into a planet or a moon. All the inner bodies in our solar system have been heavily bombarded by meteoroids throughout their history. This bombardment is clearly visible on the surfaces of the Moon, Mars and Mercury for example. On the Earth, however impact craters are continually erased by erosion or transformed by tectonics over time.
12 World Famous Geysers and Hot Springs
Posted in Landscapes | Tags: geyser, hot spring, volcano
photo Macorig Paolo
Geysers and hot springs are natural features resulting when ground water is heated by geothermal forces and brought to the surface. They provide a spectacular sight of boiling water eruptions, vivid colors and strange formations. However, for the hot spring aficionado, the greatest pleasure comes not from just looking at the spring, but from getting into the water for its therapeutic powers. Find out which of the famous geysers and hot springs on this list are for viewing and which are for bathing.
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