I thank my lucky stars for West Side Rag, as I imagine many of you do, too.

This photo was taken on the UWS, sometime in the past. Do you know where, when, and what it shows?

A sharp stream of light spilled across an old building, making it look as though it were underwater.

This photo was taken on the UWS, sometime in the past. Do you know where, when, and what it shows?

I saw my first pumpkin this week.

This photo was taken on the UWS, sometime in the past. Do you know where, when, and what it shows?

Though many New Yorkers found the Twin Towers ugly or ignored them, Stephen Harmon was "a very big fan."

This photo was taken on the UWS, sometime in the past. Do you know where, when, and what it shows?

This photo was taken on the UWS, sometime in the past. Do you know where, when, and what it shows?

This photo was taken on the UWS, sometime in the past. Do you know where, when, and what it shows?

The statue witnessed the blast at close range, well within the zone of destruction. Yet miraculously, it remained intact.

The metal bolt was planted in the early 19th century by the man who laid the groundwork for Manhattan's grid system.

This photo was taken on the UWS, sometime in the past. Do you know where, when, and what it shows?

This photo was taken on the UWS, sometime in the past. Do you know where, when, and what it shows?

Key’s song helped transform the “stars and stripes” from a mere battle flag into a sacred symbol of national pride.

This week's historical challenge is a little different: Can you put these images (plus others in the story) in chronological order?

This photo was taken on the UWS, sometime in the past. Do you know where, when, and what it shows?

This photo was taken on the UWS, sometime in the past. Do you know where, when, and what it shows?

Through “a simple twist of fate,” Joan Baez stayed with me on the Upper West Side for four days.

This photo was taken on the UWS, sometime in the past. Do you know where, when, and what it shows?

This photo was taken on the UWS, sometime in the past. Do you know where, when, and what it shows?

"We want no beer or ballet on the West Side."

This photo was taken on the UWS, sometime in the past. Do you know where, when, and what it shows?

This photo was taken on the UWS, sometime in the past. Do you know where, when, and what it shows?

Historical research will become more fraught and less fun when you don’t know what you can trust.

Do you know where and when this photo of the Upper West Side was taken?

Our attempt to get to the bottom of an Upper West Side mystery.

This photo was taken on the UWS, sometime in the past. Do you know where, when, and what it shows?

The Code of the West may have found one of its most enduring voices right here at 74th and Columbus.

This photo was taken on the UWS, sometime in the past. Do you know where, when, and what it shows?