Rockefeller donated his extensive lands on the island to the United States' National Park Service, under the condition that the lands had to be protected from future development. The remaining portion, the Caneel Bay Resort, operates on a lease arrangement with the NPS, which owns the underlying land. The boundaries of the Virgin Islands National Park include 75% of the island, but various in-holdings within the park boundary (e.g., Peter Bay) reduce the park lands to 60% of the island acreage. Much of the island's waters, coral reefs, and shoreline have been protected by being included in the national park. This protection was expanded in 2001, when the Virgin Islands Coral Reef National Monument was created. Transport While Saint John does not have an airport, the island is served by Cyril E. King Airport on nearby St. Thomas. There used to be a seaplane base in the town of Cruz Bay. Antilles Airboats provided regular service until it was sold by Maureen O'Hara. The Virgin Islands Seaplane Shuttle also used to offer services to that seaplane base using Grumman Mallard air boats prior to Hurricane Hugo. A ferry service runs hourly from Red Hook, St. Thomas, thrice daily from Charlotte Amalie, St. Thomas, and daily from Tortola; regular ferries also operate from Virgin Gorda, Jost Van Dyke and Anegada. Cars and cargo are transported to the island via barge. Two companies offer barge service between Red Hook, St. Thomas and Cruz Bay, Saint John. The barges operate hourly during daylight hours. Although prohibited by Virgin Islands law, some rental car companies allow their vehicles to use the car ferry. This is because the U.S. District Court deemed the law to violate the Interstate Commerce Clause of the United States Constitution. However, as of 2017, the unconstitutional law is still technically on the books, but the Government of the Virgin Islands does not enforce it. Car rental companies are located throughout Cruz Bay, most within easy walking distance of the ferry dock. Taxis are widely available on Saint John to provide transport to beaches, hotels, and vacation villas. Water taxi service is also available from Dolphin Water Taxi. VITRAN public bus service runs hourly on weekdays between Cruz Bay and Salt Pond Bay via Centerline Road. Major port town In the colonial era, Coral Bay was the hub of economic activity on the island. Its natural port offered protection to the