America’s National Park System has been described as the country’s best idea and, as we all know, the only way to make something that incredible even better is to make it free—and that’s just what they did.
Most of the country’s 405 national parks are always free, but 133 of them charge entry fees or offer tours that cost money. For a few days this year, those park fees will be waived so that everyone can enjoy the parks, while keeping their budget intact. According to NPS, here are the 2015 free days:
Martin Luther King Jr. Day
Presidents Day weekend
Opening weekend of National Park Week
National Park Service Birthday
National Public Lands Day
If you’ve been meaning to check out some of the country’s most amazing natural beauty, like Denali national park in Alaska, Hawaii volcanoes national park or Acadia national park in Maine, these dates might be the perfect opportunity. Check out the full list of participating parks here—and start planning some trips for 2015.