I am on the fence,
though I am threatening to fall into the realm of believing.
(For Bigfoot/Yeti, and Nessi or other lake monsters.)
There have been a number of photographs,
but they could be explained by several other things.
There are videos too, but the same problem.
The thing is there are so many!
No definitive proof, but when so many people have seen it...?
The same for Yeti or Bigfoots (bigfeet?
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),
did you know there are over 2,000 different casts of Yeti tracks.
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And if you go to Nepal and around the Everest region,
the people there think of the Yeti as a real animal.
There is no doubt in their mind it actually exists.
Then of course there is that 2 entirely different cultures have seen these beasts,
and have legends of them dating back for a long time...
(before the modern world, so they never would have interacted.)
There are sightings all over the world of similar creatures that we call myths,
but I find it hard to dismiss these as just myths because: "We haven't found them yet."