Angostura, Or Cindad Bolivar, a city of Venezuela, capital of the province of Guayana, on the right bank of the river Orinoco, at a pass (angostura) where it is confined between high rocks, about 260 m. S. E. of Caracas; pop. about 7,000. It was founded in 1674, and named San Tomas de la Nueva Guayana, to distinguish it from another San Tomas 32 leagues distant. Its name was changed to Ciudad Bolivar, and subsequently in common speech to Angostura. It is built in the form of an amphitheatre, on the slope of a rocky hill, destitute of vegetation. The houses are massively constructed, usually of two stories. The city is the principal emporium for the commerce of the Orinoco, although 240 m. from the mouth of the river. It is the seat of a bishopric, and contains a college, ecclesiastical seminary, hospital, and a hall in which a session of the congress of Colombia, then including New Granada and Venezuela, was held in 1819. The city is defended by a fort on the opposite side of the river, here 3,100 ft. wide. The exports consist of cotton, cocoa, indigo, hides, sugar, and Angostura bark.