Ibiza has several architectural highlights.  Of primary interest are the walls that surround the Old Town.  These were built as part of the city's defense and fortification in the 16th Century and remain intact today, including the seven artillery bastions that tower above the thick walls.  Some additional walls from previous forticifications remain standing within.  The enclosed cathedral was built sometime around the 15th Century.

Examples of more modern local architecture include the Teatro Pereira and the Hotel Montesol, both of which exhibit a characteristic mix of colonial and classical architecture on a grand scale.

Outside of town you can find many examples of the island's traditional, rural architecture, characterized by light-colored buildings designed to be simple, functional and picturesque, often centered around a porch or portico.