"I am always at a loss," said Irving, "to know how much to believe of my own stories." His History of New York, published in 1809 under the pseudonym Diedrich Knickerbocker, fooled many of the people much of the time.
The "Legend of Sleepy Hollow" was published in 1820. If you've only seen the rip-offs of it, you really ought to read the original, available at Project Gutenberg.
The entrance to Irving's home Sunnyside, in Tarrytown, New York, boasts this lovely sculpture by Daniel Chester French.
Sunnyside and Sleepy Hollow are an easy train ride from New York.