<Table> <Tr> <Th_colspan="2"> Mesa Verde National Park </Th> </Tr> <Tr> <Td_colspan="2"> IUCN category II (national park) </Td> </Tr> <Tr> <Td_colspan="2"> Mesa Verde from the northeast, May 2007 </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Location </Th> <Td> Montezuma County, Colorado, United States, North America </Td> </Tr> <Tr> <Th> Nearest city </Th> <Td> Cortez, Colorado </Td> </Tr> <Tr> <Th> Coordinates </Th> <Td> 37 ° 11 ′ 02" N 108 ° 29 ′ 19" W ﻿ / ﻿ 37.183784 ° N 108.488687 ° W ﻿ / 37.183784; - 108.488687 Coordinates: 37 ° 11 ′ 02" N 108 ° 29 ′ 19" W ﻿ / ﻿ 37.183784 ° N 108.488687 ° W ﻿ / 37.183784; - 108.488687 </Td> </Tr> <Tr> <Th> Area </Th> <Td> 52,485 acres (212.40 km) </Td> </Tr> <Tr> <Th> Established </Th> <Td> June 29, 1906 (1906 - 06 - 29) </Td> </Tr> <Tr> <Th> Visitors </Th> <Td> 613,788 (in 2017) </Td> </Tr> <Tr> <Th> Governing body </Th> <Td> National Park Service </Td> </Tr> <Tr> <Th> Website </Th> <Td> Mesa Verde National Park </Td> </Tr> <Tr> <Th_colspan="2"> </Th> </Tr> <Tr> <Th_colspan="2"> UNESCO World Heritage Site </Th> </Tr> <Tr> <Th> Type </Th> <Td> Cultural </Td> </Tr> <Tr> <Th> Criteria </Th> <Td> iii </Td> </Tr> <Tr> <Th> Designated </Th> <Td> 1978 (2nd session) </Td> </Tr> <Tr> <Th> Reference no . </Th> <Td> 27 </Td> </Tr> <Tr> <Th> State Party </Th> <Td> United States </Td> </Tr> <Tr> <Th> Region </Th> <Td> Europe and North America </Td> </Tr> <Tr> <Th_colspan="2"> </Th> </Tr> <Tr> <Th_colspan="2"> U.S. National Register of Historic Places </Th> </Tr> <Tr> <Th> Designated </Th> <Td> October 15, 1966 </Td> </Tr> <Tr> <Th> Reference no . </Th> <Td> 66000251 </Td> </Tr> <Tr> <Th_colspan="2"> </Th> </Tr> <Tr> <Th_colspan="2"> </Th> </Tr> </Table> <Tr> <Th_colspan="2"> Mesa Verde National Park </Th> </Tr>

When did mesa verde became a national park