Compared to Earth Day and Easter, Arbor Day gets relatively little recognition each April. If you lack the resources to plant a tree this year, why not visit one of the oldest forests in the world? These seven take top spots for age, all beautiful reminders to protect our trees. © Filipe Frazao | Dreamstime.com

In Australia, the Tarkine Forest houses 3,000-year-old pine trees along with some resident Tasmanian devils. The temperate rainforest, the second-largest on earth, looks like a step back in time, more suitable for dinosaurs than adventurous travelers. © Houani | Dreamstime.com

Across the world in Alaska, Tongass National Forest offers 16.8 million acres of trees, many individually hundreds of years old. The diverse wildlife includes Alaskan classics, from grizzly bears to salmon, and the forest boasts more organic matter per acre than any other. © Jerry Murphy | Dreamstime.com

The Pando Aspen Grove in Utah is unique because it behaves like a single organism. Scientists guess the forest — all interconnected via one root system — is up to 1 million years old. © Clifton Smith | Dreamstime.com

Kakamega Forest in Kenya was at one time the largest old-growth forest in the world, at a whopping 2 million years old. Unfortunately, this rainforest diminished greatly over the last few decades. Now it covers a mere 90 square miles. © Ivkuzmin | Dreamstime.com

Similarly, the Borneo Lowland Rainforest, approximately 140 million years old, is shrinking quickly due to climate change and deforestation. Residents include endangered orangutans and the world’s smallest squirrels. © Fabio Lamanna | Dreamstime.com

Of course, the Amazon Rainforest takes a top spot for its long life (55 million years), remote corners and impressive array of wildlife. More than 10 percent of Earth’s biodiversity resides in the Amazon. © Gábor Kovács | Dreamstime.com

Scientists consider the Daintree Rainforest the oldest in the world, dating to prehistoric eras and home to thousands of rare species, including more than 10,000 insect species. The largest stand of tropical rainforest on the continent, it shelters a third of Australia’s frog population, nearly a fifth of the bird species and more than half the butterfly and bat species. © Jon Meegan | Dreamstime.com