Make your own way to Honokohau Harbor in Kailua-Kona to board the 18-passenger vessel and begin your tour. Sail south toward Kealakekua Bay and pass sites, such as the Captain Cook Monument, as the crew gives informative commentary about the history of the area. If weather permits, explore the nearby sea caves—unusual rock formations—which are only accessible by water.
Snorkel around the bay to observe colorful coral and tropical fish. Keep a lookout for green sea turtles and dolphins that are usually seen swimming around these waters with their pods. Enjoy refreshments and a light lunch before heading back to the harbor.