The picture shows the entire area at and below the famous Infiernillo Bridge. At this point, the Rio Rimac Valley (Rimac River) becomes very narrow between steep mountains. We can see the Tunnel 33 portal, the mountain over Tunnel 34, the Infiernillo bridge right at the mouth of Tunnel 34 and the track disappearing into Tunnel 35. The train is going uphill. About the river, the name Rímac is from the Quechua word rimaq, meaning "speaker, speaking", leading to it being nicknamed El Río Hablador ("the talking river").
... and this is not a drone picture! Rather a painful hike photo.