Parque Bolivar is a nice place to relax.
Ovservant people will see that each tree is full of iguanas.

The Malecon 2000 is a wonderful walking strip guarded by police. You can spend the whole day here because it is so relaxing to walk through the park. There are lots of restaurants shopping oppurtunities and activities.

Las Peñas is Guayaquil's oldest neighborhood with colorfull renovated buildings to find on a hill at the left end of the Malecon 2000.
You also can take nice pictures of the city from the lighthouse at the top of the Cerro Santa Ana.

The Public Cemetery is something to see, really. Old graves, a lot of trees and humidity in a very quiet place, not dangerous. Beatiful...and free!

Las Peñas, beautiful little and colorful houses :)

It gets very hot here so bring the aeroguard and be careful of mosquitos, they still have yellow fever outbreaks in Guayaquil, so make sure you get your shots before going.  Head to Salinas (beach area) to get away from the hustle and bustle of the city, outside Guayaquil, some of the better beaches in Ecuador with white sand, not the grotty grey sand.  It can also get dangerous on the streets, so be savvy!

Camarones. En cualquier lugar son excelentes

Guayaquil is quite danger ...

Go to the Malecón Go to the Seminario Park to feed the iguanas

lots of theives and caymans....i wouldn't go into the water or walk the streets alone at night