Humpback whales can be seen from all of the Hawaiian islands (the region's warm, shallow waters attract humpback whales), but the Auau Channel between Maui, Molokai and Lanai is one of the world's best whale-watching destinations. You may be able to spot these majestic creatures from the shore if you plan your visit between December and May, but for the best views, you'll want to sign up for a tour.

Your hotel may offer a whale-watching excursion, but there are also several tour companies that depart from Maui. This will require you to take the ferry over to Maui, but according to past visitors, it's an experience you won't want to miss. Ultimate Whale Watch & Snorkel, Hawaii Ocean Rafting and Sail Trilogy all receive high marks from travelers. Tours, which typically depart from Lahaina Harbor in Maui, last around two hours. Prices vary by company, but you can expect to pay at least $50 per adult. Some tour boats also come equipped with a hydrophone, which allows guests to hear the whales underwater.

Keep in mind: Whale-watching tours are only offered from December to May. Visit each company's website for more information on pricing and booking.