High Quality Content by WIKIPEDIA articles! Voksenkollen is a station on Holmenkollbanen (line 1) of the Oslo T-bane system. It is the penultimate station on the line, between Lillevann and Frognerseteren. It is also the second highest station on the network, 460 metres above sea level. The station was opened in 1916 when the line was extended from Besserud (then called Holmenkollen) to Frognerseteren.The station is the one closest to the transmitting tower and tourist attraction Tryvannstårnet. Also near the station are a number of hotels and conference centres, including Soria Moria, where the Second cabinet Stoltenberg had their preliminary discussions in 2005.