In celebration of the 100th year of the National Parks Service, admission is free to all of the National Parks from August 25th through the 28th.

From the nps.gov:

"The National Park Service turns 100 on August 25, 2016, and we're inviting visitors of all ages to join in the celebration throughout the month! With special events across the country, and free admission to all 412 national parks from August 25 through August 28, the National Park Service is encouraging everyone to #FindYourPark / #EncuentraTuParque for the centennial!" 

See more info at nps.gov.

Here are some photos from Sony Artisan Of Imagery Spencer Pablo to get you inspired to go.

Death Valley National Park. Sony α7R II, Sony FE 90mm f/2.8 Macro G OSS lens. 

Acadia National Park. Sony α7R II, Sony Vario-Tessar T* FE 16-35mm f/4 ZA OSS lens.

Sequoia National Park. Sony α7R II, Sony Vario-Tessar T* FE 16-35mm f/4 ZA OSS lens.

Cabrillo National Monument. Sony α7R, 85mm lens.

Yosemite National Park. Sony A350