Starting at the Plaza de Armas, walk northwest on Conde de Superunda to Camaná. The Iglesia de Santo Domingo lies on the corner. Don’t let the pretty pastel décor fool you: this Lima church houses (and displays) the skulls of San Martín and Santa Rosa.
Walk southwest on Camaná two blocks to the Iglesia de San Agustín at Ucayali. This Lima church — flanked on both sides by red concrete — is fairly foreboding from the outside but the interior is soothing.
Exit the Iglesia de San Agustín and head one block further on Camaná, turn left onto Miró Quesada and arrive another block later at the Iglesia de Merced. You will be rewarded with at least two dozen ornate and magnificent baroque and renaissance-style altars. And the crazy thing is, there are no other tourists in this place to wander into your frame and spoil your photo!
After exiting the Iglesia de Merced, keep going down Miró Quesada for three blocks, then take a left onto Azángaro and go another three blocks to the popular (too popular?) Monasterio de San Francisco, the final stop on this Lima church walk.