John Halford
https://www.bbc.co.uk/news/uk-england-beds-bucks-herts-44416338

Hue Pham and Hue Tran
http://www.internationalcruisevictims.org/LatestMemberStories/Hue_Pham_Hue_Tran.html

Karen Denise Wells
http://charleyproject.org/case/karen-denise-wells

Frank Lenz
https://en.wikipedia.org/wiki/Frank_Lenz_(cyclist)#Journey_around_the_world
https://www.thevintagenews.com/2018/10/31/frank-lenz/

Melvin Nadel
https://www.strangeoutdoors.com/mysterious-stories-blog/2017/10/23/mel-nadel-strange-disappearances-from-us-national-forests

Natalee Holloway
https://en.wikipedia.org/wiki/Disappearance_of_Natalee_Holloway#Unrelated_bone_discovery,_contested_Oxygen_documentary
https://www.ranker.com/list/people-who-disappeared-on-vacation/cheryl-adams-richkoff

Sister Eileen Christie
https://www.foxnews.com/us/new-york-nun-is-reported-missing-on-vacation-in-austria
https://www.newsday.com/long-island/missing-nun-sister-eileen-honor-1.25518900
https://www.ranker.com/list/people-who-disappeared-on-vacation/cheryl-adams-richkoff

Norman Lee
https://www.washingtonpost.com/news/morning-mix/wp/2015/03/09/cayman-authorities-call-off-search-for-dc-marvel-comic-artist-norman-lee/?utm_term=.8edcf58bc40c
https://comicbook.com/2016/11/03/fbi-offers-10k-reward-in-case-of-missing-comic-artist-norman-lee/

Leo Widicker
http://charleyproject.org/case/leo-widicker

Virginia Carpenter
https://en.wikipedia.org/wiki/Texarkana_Moonlight_Murders
https://en.wikipedia.org/wiki/Disappearance_of_Virginia_Carpenter