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?

A lesson from "What Is This?": Blizzard warnings are triggered by wind levels, not by a specific level of expected snow.

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 castle-like First Battery Armory, more than a century old, is an UWS example of adaptive reuse.

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

In World War I-era raids, the federal government detained "slackers" on the UWS and throughout the city.

"The shop is very Upper West Side," says one longtime patron.

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

Rag Radio spoke with Rob Garber, author of the Rag's biweekly UWS Historical Photo Challenge.

Schrader's memoir-in-vignettes is full of stories of a vanished New York.

In honor of Marty Reisman, UWS table-tennis legend and inspiration for the movie "Marty Supreme," here's an historical ping-pong challenge.

The scandal behind a fountain by Riverside Park.

Telio’s, the Mediterranean restaurant formerly called Telio Taverna, officially reopened December 4th.

The American Democracy wing of the New York Historical, now under construction, is scheduled to open next June.

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

"People in the Boat Basin were hardy. You had to be," writes longtime resident Leslie Day.

That juxtaposition — beauty that rests on a painful past — is the point of this show, which features 30 quilts from the museum's collection.

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

In the vanished days of the 1970s and 80s, unlike today, security was of little or no concern.

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

A six-minute immersive panoramic-video experience brings to life the moment that the asteroid — traveling about 45,000 miles per hour — struck Earth.

Ask anyone who’s lived on the UWS long enough, and they’ll tell you: this neighborhood used to move after dark.

Among the seminal documents of the American Revolution on display are Thomas Paine's Common Sense and versions of the Declaration of Independence.

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