One loop of Yellowbirch Park

The quest

50 minutes in Yellowbirch Park (north-west of centre, London): leave the parking lot behind, pick a bench, listen.

Steps

1. Enter Yellowbirch Park at a public gate.
2. Walk until you have left the parking lot behind. Sit on one bench.
3. Name two non-traffic sounds. Leave by the same gate.

Why this is on the board

Parks like Yellowbirch Park (north-west of centre, London) are how London was laid out for people who do not have a cottage. One loop, one bench, two sounds — the city used as it was meant to be used.