alt Hacker NewsHenge Finder
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On mobile there's no info other than "please visit from a desktop/laptop computer", so for anyone else not near one:
> Finds when the sun aligns with your street for a perfect sunset view (like Manhattanhenge).
> * Enter an address to check for alignment with the sunset (or more specifically, alignment a little before sunset, the last moment the sun is at 50˚)
> * Shows street bearing and sun alignment information
> * Displays coordinates and next henge date (if there is one)
About 10 years ago I was working in Manhattan and I was walking down 42nd towards the train station after work. I looked off towards the sunset and thought "Wow, it's setting right between all the buildings." Then I looked the other way and saw dozens of people taking photos. I had accidentally seen Manhattanhenge and probably ruined a few photos.
The funny thing is that Stonehenge isn't strictly speaking a henge. A henge is an earthwork with a ditch inside a banked earth wall. There might or might not be stones inside the the earthwork.
It would be cool if you could toggle sunset/sunrise - my street slopes upward to the east and sunrise might be more interesting.
Actually more fun is the "henge near me" page[1] which lets you test alignment on a map of a chosen city. Very nice interactive use of Google Maps, flipping red alignment bars on and off as the date changes.
On March 12, 2026, all the avenues in the Sunset and Richmond districts of San Francisco are Henge candidates. These are the avenues that are named in alphabetic sequence, North to South. Anyone who grew up in The City can recite the whole sequence (Anza, Balboa, Cabrillo... Vicente, Wawona, Yorba).
[1] https://hengefinder.rcdis.co/henge_near_me