Preposition: On

1. On indicates location higher than something and touching it; on top of.          

Pattern: on + noun
The newspaper is on the table.
Please sign your name on the dotted line.

2. On indicates an outside location.                  

Pattern: on + the + noun
He was standing on the corner of First Street and Maple Avenue.
Let's have a barbecue on the balcony.
  
 

Typical nouns after on the:

balcony, beach, corner, fence, field, ground, hill, horizon, lawn, patio, porch, roof, terrace