What is the fine-grained topic of the following text: Perhaps you’re flying into the city at night, where you’ll see the dim and orange glowing hum of the Golden Gate bridge or maybe instead its neighbor, the bridge that heads north-east towards Oakland, where at dusk you can find its lights shimmering as if it was an elaborate string of loosely bound pearls in the dark. Only return the topic.
Nighttime views of bridges in San Francisco