Wandering with a friend in downtown San Francisco last week, I was struck by all the new construction, and how much things have changed. Over the past half-dozen years I have mostly wandered more exotic paths—Son Doong Cave in Vietnam, the Kumano kodo in Japan, the Camino de Santiago, and more—and have seldom set foot in San Francisco.

The place has changed, almost beyond recognition. What struck me most in the area around Salesforce Tower is all the modern, reflective windows, which sometimes provide echoes of a distant and almost forgotten past, now alienated and completely separate from the present.

At the conclusion of our walk, we headed across the top of the Broadway Tunnel to Chinatown, which in contrast to the slicker downtown seems pretty much as it always was, a bustling enclave of tourists and Chinese-Americans doing their thing.

Here’s a “sort of take the photographer’s life in his hands” fisheye of the eastern mouth of the tunnel. You can see the light trail of a vehicle that was too close and too fast on the right of my position, and my companion as a kind of “ghost” on the left hand side of the image.