A new website uses Google Maps and your photographs to overlay images of the past on current locations.
Images are geolocated on Google Maps as locations are pinpointed. You can browse by location or zip code and see what images have been uploaded so far. Images are matched up as closely as possible in StreetView to show the actual location as it appeared.
There's also an iPhone app as well -- the HistoryPin website explains what it does:
"Explore the streets - holding your phone up to the street, the app uses your camera view to display nearby images. By selecting the image, it can be overlaid onto the modern view to create an historical comparison, which you can toggle or fade between."
FULL STORY: Picture the Past: Historypin Mashes Up Archived Photos with the Present

Analysis: Cybertruck Fatality Rate Far Exceeds That of Ford Pinto
The Tesla Cybertruck was recalled seven times last year.

National Parks Layoffs Will Cause Communities to Lose Billions
Thousands of essential park workers were laid off this week, just before the busy spring break season.

Retro-silient?: America’s First “Eco-burb,” The Woodlands Turns 50
A master-planned community north of Houston offers lessons on green infrastructure and resilient design, but falls short of its founder’s lofty affordability and walkability goals.

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Analysis: Cybertruck Fatality Rate Far Exceeds That of Ford Pinto
The Tesla Cybertruck was recalled seven times last year.

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