Mystery City #9 was obviously too easy as 60% of you guessed that the photo was of St. Louis (21% said Oklahoma City, 12% opted for Kansas City (KS) and 7% voted for Waco). Even our regular commenters–with helpful hints and links–must have thought it too simply obvious.

Luis took this shot of downtown St. Louis, looking west, from atop the Gateway Arch. The beautiful building below is the Old Courthouse, which is now a museum. It was also the site of the first two trials of the Dred Scott case in 1847 and 1850, and where Virginia Minor’s case for a woman’s right to vote came to trial in the 1870s. There is also a well-known photograph from late in the 2008 presidential campaign when Barack Obama held a huge rally in the space around the Old Courthouse.

We will have Mystery City #10 on Tuesday and Luis promises that this one will be much more difficult than St. Louis. Previous Mystery Cities have included Caracas, Valaparaiso, Sydney, Bratislava, La Paz and Santiago, Long Beach and Toronto.