The name of the city of Nan Madol means "spacing between", which probably refers to the channels between the islets.
There are 27 islands on Lake Baikal.
It is situated between Michigan and Ontario shores.
Traces of primitive stone working have been found in the Gobi area, which are dated to over 100,000 years ago.
Santorini is also known for its beautiful sunsets, some tourists come here mainly for this reason.
It is not known precisely how many people died as a result of the eruption of 79, but it is estimated that the population of Pompeii and Herculaneum may have totaled 20,000.
It is surprising that an island was chosen as the city's construction site, where there is no access to drinking water or arable land.
Tanganyika is the world's longest freshwater lake, it is 673 km (418 mi) long.
According to the calculations of the scientists, the structures were erected by the effort of a huge number of workers during several hundred years.
The Gobi is inhabited by migratory peoples engaged in cattle ranching.