Teheranno (alternatively Teheran-ro, translation “Tehran Boulevard”) is a street in the Gangnam district of Seoul, South Korea. It runs from Gangnam Station through Yeoksam-dong and into Samseong-dong. It is colloquially known as “Teheran Valley” (after Silicon Valley) due the number of internet-related companies operating there, including major domestic internet portals Daum and Naver as well as Google. Samsung Electronics and Hynix both operate offices here as well. Various Korean and international financial and business institutions including POSCO, Standard Chartered and Citibank also maintain offices here. Some of Korea's tallest skyscrapers and most expensive real estate are on Teheranno, while Seoul Metropolitan Government estimates that more than half of Korea's venture capital, some 200,000,000,000 won (approximately $200,000,000), is invested in Teheran Valley.
Teheranno is a 3.5 km section of Korean Highway 90, and runs eastwards from Gangnam Station to Samseong Station and the COEX/KWTC complex. Yeoksam and Seolleung stations are also on Teheranno. All stations are on Seoul Subway Line 2.
In 1976, the Seoul Metropolitan Government suggested that the city of Seoul and Tehran, pre-revolutionary Iran exchange the names of streets on the occasion of the visit to Korea of the Mayor of Tehran. The following year, the street previously named Samneungno was renamed Teheranno, which ran through a relatively underdeveloped area recently annexed into Seoul (in 1963).(There is a street in Tehran called - Seoul Street). In the following years, the district of Gangnam-gu experienced phenomenal growth and waves of construction that continues even today, with Teheranno becoming one of the busiest streets in South Korea. Seoul St. in Tehran runs in the north of that city, close to the Evin district.
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