Hey! I got this by ear from this acoustic session:
https://www.youtube.com/watch?v=BqvIRb6SqKk

I'm not 100% sure about the lyrics in some parts, but I'm quite positive the chords are correct.
Also, the strumming is quite easy, it goes: (D= down stroke, U= up stroke)

D DUDU DDD D DUDUD DDD

The chords:
G - 320033
Em7 - 022033
Cadd9 - x32033
Am - x02210
C - x32010
G/B# - 200033


[FIRST VERSE]
G          Em7        Cadd9
I'm going down to the city
G                   Em7          Cadd9
Where the cars and buses pass by quickly
G         Em7     Cadd9
I'm going out to Tibidabo
G                Em7         Cadd9
The planes and lights move so slow

[CHORUS]
Am       C         G               G/B#        Am
It's so big from below but it's so small from above
         C         G               G/B#        Am
It's so big from below but it's so small from above
C(just one stroke)
...From above

(cool clapping hands part)
G - Em7 - Cadd9 x2

[SECOND VERSE]
G              Em7               Cadd9
I know where I am cause I see the TV
G       Em7             Cadd9
See you down between the purée
G              Em7                     Cadd9
I know where I am cause light shines my sieve
G            Em7          Cadd9
Six hundred miles away from me

[CHORUS]
Am       C         G               G/B#        Am
It's so big from below but it's so small from above
         C         G               G/B#        Am
It's so big from below but it's so small from above
C(just one stroke)
...From above

(last claps)
G - Em7 - Cadd9 x2