The Genesis Myth
Many creation myths are similar to that of Adam and Eve and arose quite independently of the Judeo-Christian tradition. These include:
the early Greek creation myth;
the Japanese
African Bushmen
the Aboriginal
the Iroquois
the Mesopotamian
the Babylonian
the Navajo
the Norse
the Chinese
the Lakota
the Apache
the Dakota
and of course, Genesis.
And these are just but a few of the myths. Others can be found
here (with discussion of each).
All speak of a creator, a given instruction, disobedience to the instruction, a fall, and an explanation of why things are the way they are today, e.g., why we have to work, why there is pain, why there is death, etc.
The Flood Myth
Information on the Flood Myth can be found
here. Besides the objections listed here, it should be noted that flood myths occur in most civilizations which were prone to periodic flooding, but are conspicuously absent in civilizations which were not prone to flooding.
Moreover, a flood producing enough water to cover the entire planet would require rainfall at the rate of six inches per minute continuously for 40 days. (The world's record for rainfall rate per minute is 1.5 inches.) Saturating the atmosphere with enough moisture to produce that much rainfall would raise the surface pressure to 13,500 pounds/inch^2 (normal is 14.5 pounds/inch^2) which would have crushed every living thing long before the rain started!
Finally, assuming all that rain occurred and water cooled according to the wet adiabatic lapse rate and the water remained liquid above the surface of Mount Everest (39,035 feet) would require the surface temperature at sea level at the time rainfall began to be 137 degrees --
and that temperature would have to be maintained throughout the entire period of the deluge! The world record high temperature is 136 degrees at Azzizya, Libya. Were the temperature at sea level to drop to 72 degrees, the temperature at the surface of the water at 39.335 feet would be -28 F and the water would be frozen to a depth of nearly two miles. Noah and the animals could have walked off the Ark and ice-skated, were it not for the fact that they were 4,000 feet above the "death zone", where the body begins to deterioriate as it literally consumes itself for energy. (In actuality, they could not have remained 4,000 feet above the "Death Zone" for several days without dying.)
The Babel Myth
The Tower of Babel was most likely a ziggurat The Book of Jubilees described it as such:
And they began to build, and in the fourth week they made brick with fire, and the bricks served them for stone, and the clay with which they cemented them together was asphalt which comes out of the sea, and out of the fountains of water in the land of Shinar. And they built it: forty and three years were they building it; its breadth was 203 bricks, and the height [of a brick] was the third of one; its height amounted to 5433 cubits and 2 palms, and [the extent of one wall was] thirteen stades [and of the other thirty stades].(Jubilees 10:20-21)
Which would have indicated a building roughly eight miles tall.
Problem: The Death Zone, which we discussed in The Flood Myth. Assuming a building which was 42,240 feet tall, the last 3.5 miles would have been in the Death Zone -- and anybody who climbed that high carrying the kind of load required to build a stable edifice 8 miles high would have perished before he ever got to the top of the ziggurat!
That's assuming the technology existed before 2,500 BCE (the time of the construction of the Great Pyramid of Giza) to build a structure eight miles high.
The Great Pyramid of Giza (which was an actual, known entity) was 480 feet high and was the tallest building prior to the construction of the Lincoln Cathedral in the 14th century.