This beautifully restored museum is worth a visit for its wide-ranging exhibits on everything from archeology to ethnology to numismatics to colonial weaponry. The museum has a beautiful, bright inner courtyard displaying some lovely, early 19th-century furniture, as well as an ornate horse-drawn hearse. Lots of natural light illuminates the quirky, Victorian-era potpourri of natural-history exhibits, from bugs, butterflies, polymitas (snails with multicolored shells), to preserved fleas in nuptial dress, viewed under a magnifying glass. Antique buttons and buckles, pen nibs, death masks, a Masonic lodge throne in the shape of a peacock. On the historical side, there are the usual photographs of Cárdenas heroes of the wars of independence and the Revolution and a gruesome reminder of the risks rebels took, in the form of the garrote used to strangle victims to death. 

Monserrat Heights is a pleasant park that's also the site of La Ermita de Monserrat, a handsome, Colonial-Spanish style church. Built in 1875, the church is a shrine to the patron saint of Catalonians who immigrated to Cuba. This viewpoint has a spectacular view of the city and the bay, and the opposite direction is of the Yumuri River valley. There is also a snack bar in the park where you can refresh yourself.

This museum is a perfectly preserved 19th-century natural-medicine pharmacy that looks out onto the Parque de Libertad through large stained glass windows. The pharmacy closed its doors in 1964, and has been preserved exactly as it was on that day, down to the huge, ornate cash register; the log book with handwritten recipes for each prescription; the rolls of brown paper to wrap the glass bottles that were individually filled and labeled; and the ceiling-high, handsome wood-and-glass cases holding hundreds of decorative porcelain jars. There are guided tours to the distillery behind the shop, where the pharmacists manufactured their world-famous trademark syrups and tonics. 

A little overwhelmed by passing traffic, this landmark square is the cultural hub of Matanzas, with the Matanzas Provincial Museum on one corner and the magnificent, neoclassical Sauto Theater taking up a whole side. In the middle of the square is the marble statue of an anonymous independence fighter known as El Soldado Desconocido (The Unknown Soldier). A couple of cafés face the theater and there's a modern art gallery to browse.