itinerary: move Golden Gate to Sep 21

days/2026-09-21.md

@@ -15,11 +15,12 @@
 - *Optional:* Twin Peaks — city panorama, 15-min stop. Navigate to [Christmas Tree Point](https://www.google.com/maps/search/Christmas+Tree+Point+San+Francisco)
 - *Optional:* Painted Ladies — 10 min north-east; short stop at Alamo Square
 - *Optional:* Lands End — 20 min west via Geary; Sutro Baths ruins + coastal trail (~45 min short version), Ocean Beach next door. Park at [Lands End Lookout](https://www.google.com/maps/search/Lands+End+Lookout+San+Francisco)
+- **Late afternoon / sunset** Golden Gate Bridge — SF-side Welcome Center and bridge walk, then cross to Battery Spencer for the panorama
 - **Evening** free
 
 ## Notes
 
-- Silicon Valley and the Golden Gate sunset moved to [Sep 20](2026-09-20.md)
+- Golden Gate Bridge and Battery Spencer were skipped on [Sep 20](2026-09-20.md) and moved here
 - **Monday:** some museums (incl. the de Young, Computer History Museum) are closed
 
 ## Addresses
@@ -30,4 +31,6 @@
 | Twin Peaks | Christmas Tree Point | [search](https://www.google.com/maps/search/?api=1&query=Christmas+Tree+Point+San+Francisco) |
 | Painted Ladies | Alamo Square | [search](https://www.google.com/maps/search/?api=1&query=Alamo+Square+San+Francisco) |
 | Lands End | Lands End Lookout lot | [search](https://www.google.com/maps/search/?api=1&query=Lands+End+Lookout+San+Francisco) |
+| Golden Gate Bridge Welcome Center | SF side, Welcome Center lot | [37.80778, -122.47485](https://www.google.com/maps/search/?api=1&query=37.80778,-122.47485) |
+| Battery Spencer | Conzelman Rd, Marin Headlands | [37.82802, -122.48208](https://www.google.com/maps/search/?api=1&query=37.82802,-122.48208) |
 | Alcatraz ferry | Pier 33, The Embarcadero | [search](https://www.google.com/maps/search/?api=1&query=Pier+33+Alcatraz+Landing+San+Francisco) |