As part of its celebration of the 100th birthday of the National Park Service, "CBS This Morning" has started a new feature called "On the Trail," where reporter Conor Knighton will travel to National Parks across the country. To kick it off, he started in our own backyard, at Acadia National Park.

In the video below, Knighton takes a look at Acadia, one of the smallest national parks in the system at just under 50,000 acres. But size truly doesn't matter, as Acadia is one of the most popular parks in the system. This video shows just why Acadia is so popular.

And if you want to visit Acadia this year, make sure you take advantage of the National Park Service's free admission days celebrating its 100th anniversary. The dates for free admission to Acadia and any park in the system are:

  • April 16 through 24: National Park Week
  • August 25 through 28: National Park Service Birthday
  • September 24: National Public Lands Day
  • November 11: Veterans Day