When the Tulip Bubble Burst - The mania surrounding tulips in 1630's Holland led to a historic market crash. From Businessweek.
The Dot-Com Crash - The worst crash in recent history, it dropped as quickly as it rose in the late 90's. From investopedia.
The Great Depression - The crash of 1929 led to a 10 year depression in the United States. From Wikipedia.
1924 Florida Real Estate Implosion - Florida was the site of one of the worst Real Estate crashes. From stock-market-crash.net
1987 Stock Market Crash - What led to this stock market crash? From the historic news network.
The South Sea Bubble - The 1711 crash of one of the first stocks in the world was the first major stock market crash. From Investopedia.
Asian Economic Crash - We're still in it... so they say. Find out about it here. From PBS.org.