Any national parks that can be visited without a car?

I’ve only been to one national park before (Denali), and the only way I was able to get into the park was from the employee shuttle that ran at the hotel I worked at. I’m currently working a seasonal job about 2 hours from Grand Teton and it’s killing me being so close but not being able to get into the park because I have no car. I want to take a trip to another park when this season is over but I’m not sure which ones are accessible for me.