Paseo de la Cetellana is Madrid's principal north-south avenue, running for several miles through the heart of the city and bordering the Salamanca district to its west.
The Salamanca district lies far to the avenue's east. 
mnli hypothesis: The Salamanca district lies far to the avenue's east.  premise: Paseo de la Cetellana is Madrid's principal north-south avenue, running for several miles through the heart of the city and bordering the Salamanca district to its west.