Penn Pilot

[Chessie8638]

Great website from the PA Geological Survey. Has historic aerials photos from the 1930's right up to the 1970's. Simply enter a town (IE: Altoona) and a era and red dots will pop up on the map, clicking each one will show a photo, click that to get a full screen image.

http://www.pennpilot.psu.edu/

Example:
- Altoona, PA:

Photo taken on 10-23-38: http://data.cei.psu.edu/pennpilot/era19 ... _45_54.jpg
Look at those two full circle roundhouses (one at the very top of the frame).