Myths go way back in to the world's history. There are a wide variety of myths; from old greek myths to modern american myths.

These are a few ancient myths that we have studied in class.
The legend of Perseus is a Greek myth. Perseus is the hero who killed Medusa by cutting off her head.
The legend of Orpheus and Eurydice is another Greek myth. It is about Orpheus, a legendary musician who journeyed to the realm of the dead to reclaim Eurydice, his lost wife.
The legend of Momotaro is a myth about a child who is born out of a peach.
The legend of Beowulf is a poem-styled myth about an Anglo Saxon hero and monster slayer.

Links to Legends:

These "myths" are more recent, and are seldom believed to be real.
Sasquach (aka Big Foot) is an unproven myth about a human-like ape (or ape-like human) that roams the deep woods. This myth has appeared in many places in the world.
UFOs (Unidentified Flying Objects) are commonly thought of as 'extra-terresterial flying saucers' and people from all over the world claim to have seen them.
Ghosts are believed to exist as the souls of the deceased, and there are various beliefs as to why they still roam the earth. This is an incredibly broad term, as "ghosts" have branched in to many different categories, such as hostile, mourning, guarding etc.
I'm not sure if the following are really myths; since some believe them to be real, it seems qualified.

"Harry Potter"
is a fantasy novel series about Harry Potter , a young wizard in England who discovers that he has magical powers at a young age and is selected to be enrolled in Hogwarts: School of Witchcraft and Wizardry where he has many interesting, dangerous adventures.
"Twilight" is a fantasy-romance novel series about Bella Swan, the protaganist, who falls in love with a vampire named Edward Cullen .

x-men.jpg"X-Men" is a Marvel Comics comic-book series about "mutants" with special powers.
Star Trek is a science fiction television series about the adventures of Captain James T. Kirk, captain of the U.S.S. Enterprise, taking place in the mid 21st century.