=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 200 OK
Content-Length: 0
Content-Type: application/vnd.google-earth.kml+xml kml;charset=UTF-8;charset=UTF-8
Content-Language: en-GB
Server: Microsoft-IIS/8.5
Set-Cookie: CFID=130840462; Max-Age=946080000; Expires=Mon, 20-Nov-2051 05:19:28 GMT; Path=/; HttpOnly; SameSite=Lax
Set-Cookie: CFTOKEN=e26f2e37aacdd86e-D81773A1-B39F-AC36-3DECF1B289B70BF2; Max-Age=946080000; Expires=Mon, 20-Nov-2051 05:19:28 GMT; Path=/; HttpOnly; SameSite=Lax
Set-Cookie: L=en; Path=/
Content-Disposition: inline;filename=whc-en.kml
X-XSS-Protection: 1; mode=block
X-Content-Type-Options: nosniff
Date: Sat, 27 Nov 2021 17:19:27 GMT
Connection: close

Request headers
================
HEAD /en/list/kml/whc-en.kml HTTP/1.1
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Host: whc.unesco.org
Accept: */*
Referer: http://web-marketing.zako.org
Connection: close


Link is valid.