Teresina is the capital and most populous municipality in the Brazilian state of Piaui. It is located in North-central Piaui 366 km from the coast.It is therefore, the only capital in the Northeast that is not located on the shores of the Atlantic Ocean. With 814 439 inhabitants, it is the 19th largest city in Brazil, and the 15th largest state capital in the country. The only natural barrier that separates Teresina from Timon is the Parnaiba river, of the largest in the Northeast. Teresina is the second capital with the best quality of life in the North-Northeast according to FIRJAN. Teresina is also the third city with the most lightning strikes in the World. For this reason, the region receives the curious name of "Chapada do Corisco".