Often regarded as the southeastern border of Europe, the Caucasus Mts stretch from the Black Sea (left) to the Caspian Sea (right). The mountain range spans 1,125 km (700 mi), forming part of the southern Russian border, and crossing Georgia, Armenia, and Azerbaijan from left to right respectively. With a snowline of approximately 3,350 m (11,000 ft) and many peaks over 4,500 m (14,760 ft), much of the snow seen in this image is present year round. Also visible in this photo are apparent phytoplankton blooms in the Caspian Sea, marked by blue-green swirls. Image credit: NASA.
A view of Mount Ararat in western Turkey through the fog. The highest of its two peaks, Greater Ararat, is the tallest mountain in Turkey at 5,166 m (16,949 ft). Although located some 32 km (20 mi) from the Armenian border, the dormant volcano dominates the skyline of Yerevan, Armenia's capital. This photo was snapped after take off from the Yerevan airport.