A graceful neoclassical structure facing the Plaza Bolívar houses this diminutive museum, where the Spanish Inquisition once plied its trade. In the 1800s, the building was expanded and rebuilt into the Peruvian senate. Today, guests can tour the basement, where morbidly hilarious wax figures are stretched on racks and flogged – to the delight of visiting eight-year-old boys. The old 1st-floor library retains a remarkable baroque wood ceiling. Entry is by half-hour guided tours, conducted in Spanish and English, after which you are free to wander.