what style or type of physical structures does the mentioned country have?
Spanish colonial architecture, Ibero-Islamic, art deco, post-modern, and many other architectural forms are visible throughout the island.
Puerto Rico
The architecture of Puerto Rico demonstrates a broad variety of traditions, styles and national influences accumulated over four centuries of Spanish rule, and a century of American rule. Spanish colonial architecture, Ibero-Islamic, art deco, post-modern, and many other architectural forms are visible throughout the island. 
what is the money called in puerto rico Puerto Rican dollars and peso. what are it's official language spoken there? Spanish and English. what's special about it's environment? It consists of the main island of Puerto Rico and various smaller islands, including Vieques, Culebra, Mona, Desecheo, and Caja de Muertos. Of these five, only Culebra and Vieques are inhabited year-round. and what faith do the people follow there? The Roman Catholic Church. name a few food delicacies found there. “Mofongo", “Arroz con gandules", “Pasteles", “Alcapurrias" and pig roast are some of them.
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Puerto Rico [SEP] Architecture
The architecture of Puerto Rico demonstrates a broad variety of traditions, styles and national influences accumulated over four centuries of Spanish rule, and a century of American rule. Spanish colonial architecture, Ibero-Islamic, art deco, post-modern, and many other architectural forms are visible throughout the island. From town to town, there are also many regional distinctions. Old San Juan is one of the two "barrios", in addition to Santurce, that made up the municipality of San Juan from 1864 to 1951, at which time the former independent municipality of Río Piedras was annexed. With its abundance of shops, historic places, museums, open air cafés, restaurants, gracious homes, tree-shaded plazas, and its old beauty and architectonical peculiarity, Old San Juan is a main spot for local and internal tourism.