I just found interesting list of largest and biggest cities on the world. Here are first twenty sorted by the estimated population at 01.01.2009. These are approximate figures so data on other sites can be different according to the different methods of measuring. 1. Tokyo (Japan) 33 800 000

Popocatepetl is the second highest mountain in Mexico with height of 5426 m. It is also an active volcano. Popocatepetl is located 70 km southeast of Mexico City. Popocatepetl is visible from Mexico City if the days are bright. It is the one of the most active volcanoes in Mexico with over 20 eruptions in [...]