There are three facades: the east facade, shown above, depicts the Nativity; the west facade depicts the Passion of Christ; the south facade, now under construction, depicts the Glory of the risen Christ.
The photos above show the four towers of the east facade and some fruit or flowers on the top of some arches on the east. Below is a tree with birds on it located between the four towers on the Nativity facade.
Below are three photos of sculptures from the Nativity facade. The middle one with the children is my personal favorite.
Below is one of he towers on the west or Passion facade.
The photos below are all of the west or Passion facade. The style of these sculptures and layout is very different from the Nativity facade. It is very stark and modernistic. This is the work of an artist by the name of Josep Maria Subirachs.