The Contador River is located in the northwest of São Tomé and its river valley is possibly the deepest in the country. Several streams run down from the volcanic highlands into the Gulf of Guinea.There are no significant lakes on São Tomé and Príncipe.
The politics of São Tomé and Príncipe takes place in a framework of a unitary semi-presidential representative democratic republic, whereby the President of São Tomé and Príncipe is head of state and the Prime Minister of São Tomé and Príncipe is head of government, and of a multi-party system. Executive power is exercised by the government.
The Contador River is located in the northwest of São Tomé and its river valley is possibly the deepest in the country. Several streams run down from the volcanic highlands into the Gulf of Guinea.There are no significant lakes on São Tomé and Príncipe.