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-l/0e/f6/df/e4/dirty-bathroom-floor.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
Content-Type image/jpeg
ETag 763e6a7db475ec2140fc7a50c496d9fe
Last-Modified Fri, 14 Apr 2017 08:50:12 GMT
Cache-Control max-age=2592000
X-Media-CDN 184755693
X-Media-CDN-Cache PASS
X-Media-CDN-Cache-Hits 0
Access-Control-Allow-Origin *
Timing-Allow-Origin htt????/www.tripadvisor.com
Via 1.1 varnish
Fastly-Debug-Digest b0c835b0e098536385ac33a44e7761a41b5ddd5a29d79ea73523657cd7dfe492
Content-Length 6174
Accept-Ranges bytes
Date Sat, 23 Jun 2018 15:39:09 GMT
Via 1.1 varnish
Age 717541
Connection keep-alive
X-Served-By cache-iad2148-IAD, cache-cdg20744-CDG
X-Cache HIT, MISS
X-Cache-Hits 1, 0
X-Timer S1529768349.314358,VS0,VE81

Load Info

page size6174
load time (s)0.012858
redirect count0
speed download0
server IP151.101.122.38


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