The organization Answers in Genesis is building a full size replica of Noah’s ark. The ark is almost completed and is scheduled to be open to visitors on July 7. You can learn the details at https://arkencounter.com/. The flood lasted just a little over one year, but during that year the rapid burial of living creatures produced most of the fossils we find today and the geography of the earth was changed.
Knowing whether the flood occurred is essential to accurately measuring the age of the earth. If there was no flood then it would have taken millions of years to form the vast number of fossils that we find and to shape the earth into its present condition. On the other hand, if there was a flood it is possible that the earth is only a few thousand years old, as the Bible says.
Knowing there was a flood not only shows that the earth is younger than most people believe but it also shows that God is concerned about the way we live and will judge us. The rainbow is a sign that God will never send a flood that will destroy all life on earth. The next judgment will be by fire.
The purpose of the ark replica is to provide proof that the story of the flood is true. Here is some more information about the ark and the flood on the Answers in Genesis website.