Though not necessarily a must-see, Arequipa's colonial Casa del Moral is an impressive mixture of the city's white sillar stone with vivid reds and blues painted throughout its main courtyard, gardens and meticulously restored rooms. Its street-side entrance alone is worth a visit: a carved stone archway depicting regal scenes like castles, crests and animals in stunning detail. Originally constructed in 1733 by a prominent Spanish knight, this "house" now serves as an easy, inexpensive way for urban wanderers to get a taste of the 18th century Peruvian good life, complete with period furniture and artwork from the Cuzco School of Colonial Art. You can even get some stunning views of Arequipa and the surrounding mountains from the stairs to the rooftop. At around 5 PEN (roughly $2 USD), there are considerably worse ways to be spending your money in Peru.
Location:Moral 318, Arequipa, Peru
Note:If you want to impress the tour guide, tell him/her you've read that the structure is named after an old mulberry tree located in the center of the main courtyard.