
1) Badlands or Death Valley
Found on
https://www.crosswordclues.com/clue/national-park

Land that is kept in a natural state for a variety of reasons, all of them important.
Found on
http://en.wikibooks.org/wiki/Wikijunior:Big_Cats/Glossary

A national park is a park in use for conservation purposes. Often it is a reserve of natural, semi-natural, or developed land that a sovereign state declares or owns. Although individual nations designate their own national parks differently, there is a common idea: the conservation of wild nature for posterity and as a symbol of national pride. F...
Found on
http://en.wikipedia.org/wiki/National_park

Managed by the National Park Service primarily to protect resources and recreation opportunities. Some allow grazing, but do not allow hunting, mining, or other extractive uses.
Found on
http://www.americantrails.org/

an area set aside by a national government for the preservation of the natural environment. A national park may be set aside for purposes of public ... [4 related articles]
Found on
http://www.britannica.com/eb/a-z/n/14

came into being in 1935. There are now 11 in England and Wales, none yet in Scotland (but probably 2 soon). No direct remit to preserve buildings, but implies care of those buildings which are an established part of the character of the area eg stone barns in the Peak District.
Found on
http://www.encyclo.co.uk/local/20935

an area of land set aside by an act of Congress because of its unique physical and/or cultural value to the nation as a whole; administered by the Department of Interior for public use
Found on
http://www.encyclo.co.uk/visitor-contributions.php

tract of predominantly open and attractive countryside designated under the National Parks and Access to the Countryside Act 1949 with its own administration and management role and function as a local planning authority.
Found on
http://www.lawsonfairbank.co.uk/planning-glossary.html

[
n] - a tract of land declared by the national government to be public property
Found on
http://www.webdictionary.co.uk/definition.php?query=national%20park

A tract of land declared public property by the federal government to be used for cultural and recreational purposes. National parks are managed by the National Park Service.
Found on
http://www.wolf.org/wolves/learn/basic/glossary.asp
noun a tract of land declared by the national government to be public property
Found on
https://www.encyclo.co.uk/local/20974
Click images to enlargeLand available for public enjoyment. National parks include not only the most scenic places, but also places distinguished for their historic, prehistoric, or scientific interest, or for their superior recreational assets. They range from areas the size of small countries to pockets of just a few he...
Found on
https://www.encyclo.co.uk/local/21221

a tract of land declared public property by the national government to be used for cultural and recreational purposes.
Found on
https://www.encyclo.co.uk/local/22350

an area of scenic beauty, historical importance, or the like, owned and maintained by a national government for the use of the people.
Found on
https://www.infoplease.com/dictionary/national-park
No exact match found.