In honor of the National Park Service's centennial birthday, the U.S. Postal Service has issued a series of stamps that highlight national parks. The third stamp revealed is one that shows off the Assateague Island National Seashore in the Chesapeake Bay. The island is famous for wild horses that roam free.

Like the Chesapeake Bay itself, the barrier island is under constant change, said Mark Saunders of the USPS. Visitors to the park can explore sandy beaches, see salt marshes, enter maritime forests and go boating on coastal bays.

The bands of horses are as much a part of the landscape as the plants and native animals that have adapted to a life of sand, salt and wind. The previous two stamps pay tribute to Acadia National Park in Maine and Arches National Park in Utah.

Acadia stamp shows Bass Harbor Head Light

The stamp that represents Acadia highlights the Bass Harbor Head Light, Saunders said. Tourists have gone to the rugged coast of Maine throughout history. They have been impressed by its beauty and diversity. In the early 1900s, historical figures offered the land to become Acadia National Park.The park is home to many plants and animals, and the tallest mountain on the East Coast.

Tourists still flock to Acadia for its beauty and to hike, ride bikes and relax. People continue to take road trips to the park.

Stamp depicts iconic arch

For Arches National Park, USPS has a stamp with the iconic Delicate Arch, said Saunders. The park is home to more than 2,000 stone arches. Delicate Arch is just one of them. The park contains the greatest density of natural arches in the world. When visitors go to the park, they see contrasting colors, various land forms and different textures in the natural stone arches.

Besides arches, you can see hundreds of soaring pinnacles, massive fins and giant balanced rocks.

To show the world these beautiful parks depicted on stamps, USPS will take part in World Stamp Show -- New York 2016 from May 28 to June 4. Held only once a decade, this event is for stamp collectors and enthusiasts plus government employees. Stamp collecting is a hobby for a lifetime. No matter what your specialty, visitors can find it at the show, Saunders added.

On June 2, USPS will host a first-day-of-issue ceremony for the National Parks Forever Stamps.Dedication ceremonies also will take place at or near each of the National Parks depicted on the stamps.

Don't miss our page on Facebook!