Sutro Baths are cool and all, but it's kinda depressing seeing how much history has been lost to development. I feel like our city doesn't do a great job preserving these small gems.

Don't miss the Haas-Lilienthal House on Franklin. It’s a beautifully preserved Victorian home that's open to the public. Gives you a real sense of what SF looked like before the 1906 earthquake.

What about the secret tunnels rumored to be under Chinatown? Are those real? I've read some crazy stories but not sure if there's any truth.

Varsity Theater on Clement Street! It's like stepping through a portal back to its classic 1920s glory, and it's one of the few remaining single-screen theaters in the city. Really a piece of history if you're into cinema.

Definitely visit the Wave Organ near the Marina district! It's this weird acoustic sculpture that uses the movements of the water to create sounds. Built by the Exploratorium in the '80s but still kinda a hidden gem.

I've been to the Sutro Baths ruins a few times. It's kinda eerie but cool to think it was a huge indoor swimming pool complex back in the day. Nice spot for some moody photos too.

Don't forget about the old ships buried under the Financial District. SF was built over a lot of them from the Gold Rush era. There are plaques in some places that mark where they were.

The Columbarium is stunning, I agree! If you're into quirky history, check out the Redstone Building on 16th Street. It's a labor temple that played a huge role in the 1934 general strike.