Asia
The coastal periphery was home to some of the world's earliest known civilizations, each of them developing around fertile river valleys. The civilizations in Mesopotamia, the Indus Valley and the Yellow River shared many similarities. These civilizations may well have exchanged technologies and ideas such as mathematics and the wheel. Other innovations, such as writing, seem to have been developed individually in each area. Cities, states and empires developed in these lowlands.
Architecture of Taiwan
Prehistoric man made use of caves for their dwellings and Taiwan's oldest known civilization is the Changbin culture (長濱文化) dating back to over 50,000 years. An example of an archaeological site of a cave dwelling is the Bashian Caves in Changbin Township, Taitung County which is dated from between 5,500 and 30,000 years. The actual cave itself has a height of around ten meters and can accommodate some ten persons.