Sometimes you come across a famous landmark that makes you say, "Why is this famous?!"

That's the crux of a recent thread on Reddit, querying users for "the most overrated tourist attraction in your country," a guide to avoiding the worst of the world's tourist traps.

One of the most commonly mentioned tourist attractions is Plymouth Rock in Massachusetts.

"It's literally a f------ rock," sums up one succinct user.

The gray rock, inscribed with the year the Mayflower pilgrims landed (1620), has long been identified as the exact boulder that the pilgrims alighted on when they arrived in the New World. That claim, as you might imagine, is much disputed.

"The one thing the Pilgrims certainly did not do was step ashore on Plymouth Rock," writer Bill Bryson says in his book 'Made in America'. "Quite apart from the consideration that it may have stood well above the high-water mark in 1620, no prudent mariner would try to bring a ship alongside a boulder on a heaving December sea when a sheltered inlet beckoned from near by."

If that's the case, Plymouth Rock isn't a historic boulder. It's just another ordinary, unimpressive rock (which many argue it already is, history or no).

For more of the world's most overrated tourist attractions, check out the gallery above.