The immense amount of cash flowing through casinos naturally attracts the world's most ambitious criminals.

While modern security makes physical theft almost impossible, history is full of spectacular heists.

The Stardust Casino Inside Job

Unlike elaborate armed robberies, this heist involved a single man and a backpack.

Brennan simply packed half a million dollars into a bag and walked out the front door.

• Stolen amount was roughly $500,000
• No violence or weapons were used
• The FBI never solved the cold case

Phil Ivey and the Baccarat Edge

While not a traditional robbery at gunpoint, Phil Ivey's baccarat session cost casinos millions.

Lengthy legal battles ensued, ultimately resulting in judges ruling that edge sorting constituted cheating.

Hacking the Casino Surveillance System

In 2013, the Crown Casino in Melbourne was the victim of an incredibly high-tech heist.

The casino eventually discovered the breach and managed to recover most of the stolen funds.

These incredible stories remind us that casinos are engaged in a constant arms race with clever criminals.