If you are not sure if the website you want to visit is safe, you can check it out here. Enter the address (url) of the website and see the invisible elements, such as a header or meta data.
site address:media-cdn.tripadvisor.com/media/photo-s/04/9d/1b/ce/the-pillows-were-stained.jp...
site title:
Url ContentJPEG Image
MIME Type / Internet Media Typeimage/jpeg
MIME Type image
File Extension.jpeg, .jpg
More Details (link to:)RFC 1314
Powered by: Very Tiny URL Shortener at https://vturl.net VeryTinyURL

Header

HTTP/1.1 200 OK
Accept-Ranges bytes
Access-Control-Allow-Origin *
Age 0
Cache-Control max-age=2592000
Content-Type image/jpeg
Date Wed, 15 Aug 2018 08:58:59 GMT
Etag 521bee176495e7952b9a60b2172fc760
Last-Modified Mon, 01 Jun 2015 03:59:17 GMT
Server ECAcc (dcc/42B3)
Timing-Allow-Origin htt????/www.tripadvisor.com
X-Media-CDN 99688395
X-Media-CDN-Cache PASS
X-Media-CDN-Cache-Hits 0
Content-Length 23048

Load Info

page size23048
load time (s)0.204418
redirect count0
speed download0
server IP68.232.34.11


* all occurrences of the string "http://" have been changed to "htt???/"