### Instruction:
How can you get to Dry Tortugas National Park?

### Input:
Dry Tortugas National Park is a national park located about 68 miles (109 km) west of Key West in the Gulf of Mexico, in the United States. The park preserves Fort Jefferson and the seven Dry Tortugas islands, the westernmost and most isolated of the Florida Keys. The archipelago's coral reefs are the least disturbed of the Florida Keys reefs.

Most visitors arrive in Dry Tortugas National Park by either boat or seaplane from Key West. Official ferry and transportation services to the Dry Tortugas include the Yankee Freedom III catamaran, private vessel chartering and seaplane services. Other methods of visiting the Dry Tortugas include chartering of authorized and approved private vessels. There are no road connections to Dry Tortugas, and cars cannot access the islands.

### Response:
Dry Tortugas National Park can be accessed by seaplane or boat. The official ferry service is Yankee Freedom; private boats can also access the island. The islands that make up Dry Tortugas are located near Key West in the Gulf of Mexcio and cannot be accessed by car.