Despite being California’s most exotic offshore destination, Channel Islands National Park is the least visited of the Golden State’s nine national parks, with only 328,746 travelers in 2023.

Dry Tortugas National Park and Channel Islands National Park do not have venomous snakes not due to their temperature, but primarily due to their unique island environments and geographical isolation.

In 2025, the following national parks are free to all visitors: Biscayne National Park: Florida Channel Islands National Park: California Congaree National Park: South Carolina Cuyahoga Valley ...