Underwater Cypress Forest from Ice Age Reveals its Secrets. Deep beneath the waves, miles from the coast of Alabama, lies a primeval underwater forest, a grove of giant cypress trees so fresh that their trunks still ooze sap when they're cut. Most are 50,000 years old. They were covered in mud for eons but a recent hurricane revealed them. The dramatic changes that this forest underwent during a volatile period of climate change may also hold clues for Earth's climate future, experts said.