Day three takes you to Xochimilco, the canal district 26km south of the city centre.

BBC: Three days with Frida Kahlo and Diego Rivera in Mexico City

Today, Xochimilco is one of the 16 boroughs within the Mexican Federal District that makes up Mexico City proper.

BBC: Finding farms, and solitude, in Mexico City

Without them, however, Xochimilco will lose the exact thing that makes it unique.

BBC: Finding farms, and solitude, in Mexico City

Mexico City native Ricardo Rodriguez Saavedra is the director of De La Chinampa a tu Mesa, an organization devoted to restoring Xochimilco's cultural heritage by connecting the public with the chinampas' pesticide-free agricultural producers.

BBC: Finding farms, and solitude, in Mexico City

Xochimilco lies 28 km south of Mexico City.

UNESCO: Culture

Saavedra also hosts guided tours along Parque Natural Xochimilco's canals, visiting working chinampas and providing insight into their cultivation of dozens of different plants and vegetables, including nopales (prickly pear cactus), espinaca (spinach) and calabazas (pumpkin), as well as herbs such as sage and lavender.

BBC: Finding farms, and solitude, in Mexico City