Like HowStuffWorks on Facebook!

Stuff They Don't Want You to Know

Edward Leedskalnin's Coral Castle

After being jilted a day before his wedding and narrowly surviving tuberculosis, Latvian immigrant Edward Leedskalnin spent almost 30 years building Coral Castle out of huge blocks of stone. But how did he make it?


Most Watched in Conspiracy

Most Watched in Conspiracy
4:13

Stuff They Don't Want You to Know: Targeted Online Advertising

Most Watched in Conspiracy
4:24

Stuff They Don't Want You to Know: Berenstein or Berenstain? The Mandela Effect

Most Watched in Conspiracy
8:39

Stuff They Don't Want You to Know: 5 Secret Space Programs

Most Watched in Conspiracy
5:36

Stuff They Don't Want You to Know: What is the 'Red Market?'

Most Watched in Conspiracy
4:24

Stuff They Don't Want You to Know: Zombies: Part 1 - CLASSIC

Most Watched in Conspiracy
3:45

Stuff They Don't Want You to Know: Real-life Super Powers

Most Watched in Conspiracy
4:19

Stuff They Don't Want You to Know: Drones, Part 1: Target Killing | CLASSIC

Most Watched in Conspiracy
5:47

Stuff They Don't Want You to Know: 4 Weird Things about the Washington Monument

Most Watched in Conspiracy
2:58

Stuff They Don't Want You To Know: The Mafia: Fact and Fiction

Most Watched in Conspiracy
4:31

Stuff They Don't Want You to Know: Who was the Original Night Stalker?

Most Watched in Conspiracy
5:13

Stuff They Don't Want You to Know: Ghosthunters: The Warrens

Most Watched in Conspiracy
8:17

Stuff They Don't Want You to Know: Chemtrails: Experimenting on the Public


Recent Videos in Conspiracy

Recent Videos in Conspiracy
5:36

Stuff They Don't Want You to Know: What is the 'Red Market?'

Recent Videos in Conspiracy
8:39

Stuff They Don't Want You to Know: 5 Secret Space Programs

Recent Videos in Conspiracy
4:24

Stuff They Don't Want You to Know: Berenstein or Berenstain? The Mandela Effect

Recent Videos in Conspiracy
4:13

Stuff They Don't Want You to Know: Targeted Online Advertising

Recent Videos in Conspiracy
8:17

Stuff They Don't Want You to Know: Chemtrails: Experimenting on the Public

Recent Videos in Conspiracy
5:13

Stuff They Don't Want You to Know: Ghosthunters: The Warrens

Recent Videos in Conspiracy
4:31

Stuff They Don't Want You to Know: Who was the Original Night Stalker?

Recent Videos in Conspiracy
8:20

Stuff They Don't Want You to Know: 5 Things You Should Know About Primary Elections

Recent Videos in Conspiracy
10:07

Stuff They Don't Want You to Know: 5 Things You Didn't Know About Jinn

Recent Videos in Conspiracy
4:01

Stuff They Don't Want You to Know: What are the Panama Papers?

Recent Videos in Conspiracy
6:02

Stuff They Don't Want You to Know: Why do people disappear in national parks?

Recent Videos in Conspiracy
7:43

Stuff They Don't Want You to Know: ISIS Recruitment Tactics