Miyajima Island in the inland sea was once thought to be so sacred that human beings were not permitted to live on it. The home of Itsukushima Shrine which was constructed over water so that humans would not "pollute" the sacred island was built in this way because of this. Today many ferries carry traffic between the island and the mainland especially onto Hiroshima. Miyajima's maple trees are renowned throughout Japan, and blanket the island in crimson in the autumn. Because the island is still seen as sacred, trees may not be cut for lumber. Deer and monkeys roam freely. Deer are thought of as sacred in the native Shinto religion because they are considered messengers of the gods.