Z=x, es para script.
Tal vez te sirva este frame...
Código HTML:
Ver original<iframe src="https://www.google.com/maps/embed?pb=!1m14!1m8!1m3!1d3901.108332061014!2d-76.98451392209029!3d-12.104735664565572!3m2!1i1024!2i768!4f13.1!3m3!1m2!1s0x9105c7bfccca31f7%3A0x8d3db3067dabe53b!2sPacaritambo+391%2C+Lima+15037%2C+Per%C3%BA!5e0!3m2!1ses!2ses!4v1426808085502" width="100%" height="350" frameborder="0" style="border:0"></iframe>
Mas zoom..
Código HTML:
Ver original<iframe src="https://www.google.com/maps/embed?pb=!1m14!1m8!1m3!1d1950.5564446238957!2d-76.98453001534926!3d-12.104423578260242!3m2!1i1024!2i768!4f13.1!3m3!1m2!1s0x9105c7bfccca31f7%3A0x8d3db3067dabe53b!2sPacaritambo+391%2C+Lima+15037%2C+Per%C3%BA!5e0!3m2!1ses!2ses!4v1426808651825" width="100%" height="350" frameborder="0" style="border:0"></iframe>
El segundo, mejor con un script. Si no sabes como,,, preguntas.