The Ruins in Tower Grove Park was built from limestone salvaged from the Lindell Hotel, which burned down in 1857. This picture started with a Cokin P007 infrared filter and four shots one stop apart, pulled into Nik HDR Efex and processed with my custom "Dark Vintage" preset. I adjusted custom white balance in Lightroom, the used Photoshop CS5 to swap red/blue channels and do some retouching (see below). The final monochrome came from Nik Silver Efex Pro and sepia/blue split tone applied in Lightroom 3.
One big problem for this shot was lens flare. The Cokin system is great except for situations where sunlight falls directly on the filters. The P007 filter is so dark, you can't see anything in the viewfinder with it in place. I didn't notice that sunlight was bouncing off the the filter and causing this crazy lens flare in the zoom. The HDR processing really enhanced it, too.
Lens: Nikkor AF 24-85mm f2.8-4 IF
Camera: Nikon D100
Exposure: ISO 200, four brackets around 30mm @ f/16 @ 1s, Cokin P007 filter, Auto WB, tripod, RAW
Location: Tower Grove Park, St. Louis GPS
Dates: Capture - October 5, 2008, Processing - October 24, 2010Processing: Lightroom 3, Nik HDR Efex, Nik Silver Efex Pro, Photoshop CS5