Basilica Cistern, Istanbul, Turkey. Built in the 6th century by the Byzantine Empire.
{"Image Make": "Canon", "Image Model": "Canon EOS 5D Mark II", "Image XResolution": "72", "Image YResolution": "72", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Adobe Photoshop Lightroom 4.4 (Macintosh)", "Image DateTime": "2014:06:21 19:02:33", "Image ExifOffset": "216", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "808", "Thumbnail JPEGInterchangeFormatLength": "17893", "EXIF ExposureTime": "6", "EXIF FNumber": "71/10", "EXIF ExposureProgram": "Aperture Priority", "EXIF ISOSpeedRatings": "400", "EXIF ExifVersion": "0230", "EXIF DateTimeOriginal": "2013:11:04 09:08:51", "EXIF DateTimeDigitized": "2013:11:04 09:08:51", "EXIF ShutterSpeedValue": "-2584963/1000000", "EXIF ApertureValue": "2827819/500000", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "3", "EXIF MeteringMode": "Pattern", "EXIF Flash": "Flash did not fire, compulsory flash mode", "EXIF FocalLength": "16", "EXIF SubSecTimeOriginal": "93", "EXIF SubSecTimeDigitized": "93", "EXIF FocalPlaneXResolution": "5616000/1459", "EXIF FocalPlaneYResolution": "1872000/479", "EXIF FocalPlaneResolutionUnit": "2", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Auto Exposure", "EXIF WhiteBalance": "Auto", "EXIF SceneCaptureType": "Standard", "EXIF BodySerialNumber": "3751702932", "EXIF LensSpecification": "[16, 35, 0/0, 0/0]", "EXIF LensModel": "EF16-35mm f/2.8L II USM"}