Popocatépetl is an enormous smoking volcano close to Mexico City.
My suggestion:
You can go to the foot of the volcano, in the small town of Amecameca. You will have a wonderful view of Popocatépetl and his Aztec princess, Ixtaccíhuatl , ("the sleeping woman" in Nahuatl).
My review
You should know that
it has been illegal to climb Popocatépetl since the beginning of the 90s, for security reasons. Popocatépetl's most powerful eruption began in 1996 and lasted 7 years! The volcano is still very active today. If you still want to get closer to it, you can climb Iztaccihuatl by the road which leaves from
Paso de Cortés. It's not a technical climb and gives you a superb view of the volcano.