Ala Moana Beach Park sprawls across 100 acres in the midst of Honolulu, while Magic Island comprises about 30 acres of the park. Both areas are immensely popular, and folks frequently take advantage of the beaches, picnic areas, and jogging and biking paths. Facilities include showers, restrooms, and concession kiosks. The park also offers great views of the area and is often crowded with families, locals, and tourists as a result. On weekends, it may be difficult to find parking.

DIAMOND HEAD. Widely recognized as the symbol of Hawaii, this extinct volcano crater was known to ancients as Leahi, which means "brow of the tuna" and referred to its appearance from the west. Its more familiar name came from 19th-century British sailors, who mistook crystals in the soil for diamonds. Through the years, its crest was the site of altars and military installations, and today, folks often hike up the crater for awe-inspiring views of Oahu. The hike is manageable for most, although you might want to bring along a flashlight since some portions of the journey run through darkened passages. A landmark.

WAIKIKI. Formerly a US Army installation, this park was established when threats to Honolulu diminished in the 1950s. Today, the beautifully landscaped greenspace is designated as a recreational area for the military, although it's open to all. Within the park is located the US Army Museum, and on its outskirts is Hale Koa, a hotel that caters to military personnel. A beach is available for use, along with picnic facilities, restrooms, and courts for volleyball and tennis.

EAST OAHU. Created from a collapsed volcano crater, this bay is protected and calm, ideal for snorkeling, as you'll see from the crowds around you. It offers great opportunity for viewing marine life and also boasts a terrific beach and hiking trails. Additional facilities include picnic areas, showers and restrooms, concession kiosks, a volleyball court, and lifeguards. Although parking can be difficult if you don't arrive early, a shuttle bus runs from Waikiki in the mornings and makes return trips in the afternoons.

KAILUA. Set along Oahu's windward (east) coast, this beautiful beach is ideal for swimming and for windsurfing. It affords amazing views of the area and isn't as crowded as some other island beaches. A stream bisects the park and adds another dimension to aquatic activities. Lifeguards watch over the beach, and you'll also find picnic areas, a volleyball court, restrooms and showers, food services, a bike path, and equipment rentals.