Waikiki Aquarium

The Waikiki Aquarium is located right along the waterfront in Waikiki.  It is walking distance from most hotels.  You can find up-to-date information about their pricing and hours on their website: http://www.waikikiaquarium.org/.  I really enjoyed this aquarium.  It seems to be better kept up than most tourist attractions in Waikiki.  They have seals, corals, and so many kinds of fish and other critters.  I think the aquarium is worth a visit, unless you are one of those people who hate fish, and then I have to wonder what you are doing vacationing at the ocean.

Manoa Falls Hike

Manoa Falls might be the most beautiful hike on the island.  You literally feel like you are exploring the jungle, and a huge magnificent waterfall awaits you at the end.  The amount of flow over the waterfall can vary alot depending on how much rain there has been, so I recommend going when it has been raining more, although that will mean that the trail will be more muddy.  They are currently working on renovating the trail so the first part of the trail is very nice and covered with gravel, but after that there can be very muddy spots.  For parking, you can park in the neighborhood down below and walk up to the trailhead (I think it's about a half mile or so), or park at the parking lot right where the trail starts and pay $5.  This is a nice length of a hike, not too long.  It is really fantastic and I highly recommend it. 

This plant is creepy...

Waikiki Beach

Waikiki Beach gets a lot of crap for being tourist central.  However, we think that it is a great beach for snorkeling.  If you're there during peak tourist season I imagine it can be pretty annoying, but if you are comfortable snorkeling, I'm sure you can go far enough out to avoid the mass of the tourists (which isn't really very far.)  We found lots of interesting creatures not too far from shore.  My biggest tip when it comes to Waikiki, which I will probably say a lot on here, is to park at Kapiolani Park.  It is free and within walking distance of most things you want to do in Waikiki.  When we went snorkeling at Waikiki beach we literally walked across the street from Kapiolani Park and snorkeled there.  Perfect.

Cool fish I hadn't encountered before

I'm not sure what this is...

Can you see the fish in this picture?

How about now?  It's a flounder!

Honolulu Zoo

The Honolulu Zoo is located right in downtown Waikiki and is open daily from 9:00 am to 4:30 pm.  General Admission is $14 for adults and $6 for kids 3-12 years old.  Kids 2 and under are free.  There are also Kama'aina and U.S. Military rates available.  Parking is $1 per hour in their lot, or free at Kapiolani Park right across the street.  Kapiolani Park is where we park when we go to the main strip in Waikiki.  It is so close to the zoo.  Seriously, park there.  Don't pay for the zoo's parking.  The Honolulu Zoo has some fun animals, some of my favorites to see were the endemic animals such as the Nene Goose.  We had a good time there, but it is not really a must-see on your trip to Oahu.  I feel like the Hogle Zoo back in Utah was just as good (and less run down.)