Thanks to the clear, sea life-filled waters of the Pacific that lap the island's shores (and the tropical climate), Honolulu is the perfect place to learn different water activities, or make good use of the ones you're already experienced in.
First and foremost in Honolulu is surfing, for which the island of Oahu has become famous. Independent instructors, private companies, and the nicer hotels each have their unique teaching styles. For complete beginners, don't be intimidated by pictures or video you've seen of the monster waves off Oahu's coasts - you'll most likely be taken to the gentler waters off of Waikiki, where there's little risk of injury but waves just big enough to learn on.
To the east of the city and at several other places within a reasonable driving distance, there are reefs and coves that make perfect spots for snorkeling. Some are quite calm and sheltered, providing an excellent spot for a snorkeling adventure with children. Or, to get further out and down to see what deeper waters have to offer, SCUBA diving might be a better bet. There are outfits that give lessons and that take out small dive groups of every experience level. Surf n Sea is a staple on the North shore landscape, built in 1921 and housing the premiere surf shop since 1965, Surf n Sea has it all. Surf gear and apparel for most ocean activities, not to mention tours, lessons, sales and rentals, plus plenty of souvenirs.
For on-land exploration, an excellent way to get around and explore Honolulu (or the rest of the island for that matter!) is on a bicycle or moped. Easily rentable at several shops, this is an easy way to see more of the city or the whole island without the hassle of arranging a driver or renting a car.
Another obvious on-land excursion is to go for a hike, such as up the Diamond Head State Monument, which is easily visible on the southeastern end of the City. The hike to the peak is a fairly easy one, and the panoramic views of the city and sea from the top are definitely worth the walk.
Visit Honolulu's most famous site, Pearl Harbor. The tragic occurrences and subsequent world-changing events associated with this naval base make it a crucial part of American history and heritage. While the harbor is quite large, the Visitor's Center and Arizona Memorial are the hubs of tourism. There are so many things to do, Honolulu might just overwhelm you.
1 Arizona Memorial Place
Most Famous Site...
55-370 Kamehameha Highway
Laie
Island Theme Park...
Diamond Head Road and 18th Avenue
Iconic crater...
7455 Kalanianaole Highway
(Kalanianaole Highway at the Hanauma Bay turnoff)
Snorkeling Paradise...
Waikiki Beachfront
Colorful Center of Honolulu...
1525 Bernice St
Just off Kalihi St. (aka Likelike Hwy.)
Museum of Honolulu...
Trail begins at the end of Manoa Road
Manoa Falls Trail
Natural beauty of Waikiki...
2270 Kalakaua Avenue, Suite 801
Over a dozen cinder cones and craters...
2270 Kalakaua Avenue, Suite 801
Excellent scenic vistas...
2270 Kalakaua Avenue, Suite 801
Multitude of views...
2270 Kalakaua Avenue, Suite 801
Climbs a forested slope to a picnic site...
900 S. Beretania St
Thomas Square Historic District
Fine Arts Museum...
2411 Makiki Heights Dr
Art & Tranquility...
1 Aloha Tower Drive
(Box 137)
Worry-free planning for tours and adventures...
439 Kamani Street, Suite 202
For Japanese golfers primarily...
350 Ward Ave, Suite 106
Cultural field trips galore...
4997 Kahala Avenue
Golf & Much More...
1450 Ala Moana Boulevard
The heart of Honolulu and the largest shopping center in Hawaii...
2169 Kalia Road, Second Floor
Diamond Head Tower, Outrigger Reef on the Beach
Luxury Spa...
517 Kapahulu Ave
Everything from Books to Surfboards...