La Casa Lorenzo is located in the St. Ana neighborhood of Central Mérida.

Calle 41 # 516A between 62 and 64
Centro Mérida
Yucatan Mexico
CP 97000 
999-139-04-23 Mexican phone number
866-515-4105  Toll free from Canada and USA

Calle 41 is a one-way street.  Look for the flags on the left.