Playing with lens tilt

Exposure Date: 2012:08:13 06:26:41;
Make: Canon;
Model: Canon EOS DIGITAL REBEL XSi;
ExposureTime: 1/125 s;
FNumber: f/7;
ISOSpeedRatings: 200;
ExposureProgram: Normal program;
ExposureBiasValue: 4294967295/3;
MeteringMode: Pattern;
Flash: Flash did not fire, compulsory flash mode;
FocalLength: 18 mm;
Software: Adobe Photoshop Elements 11.0 Macintosh;
ExifGpsLatitude: 48 49 48 48;
ExifGpsLatitudeRef: R98;