6 Best Sights in The South Shore, Kauai

This 2-mile stretch of coast, with its sand dunes, limestone hills, sinkholes, and the Makauwahi Cave, is unlike any other on Kauai. Remains of a large ancient settlement, evidence of great battles, and the discovery of a now-underwater petroglyph field indicate that Hawaiians lived in this area as early as AD 700. Mahaulepu's coastline is unprotected and rocky, which makes venturing into the ocean hazardous. There are three beach areas with bits of sandy-bottom swimming; however, the best way to experience Mahaulepu is simply to roam, on foot or horseback along the sand or trails. Pack water and sun protection. Access to this beach is via private property. Before driving or hiking here, check current gate hours and conditions as the unpaved road can be closed due to weather, grading, or movie filming. Access is during daylight hours only, so be sure to depart before sunset or risk getting locked in for the night. Amenities: parking (no fee). Best for: solitude; sunrise; walking.

At the most popular beach on the South Shore, the snorkeling and swimming are good during calm seas; when the surf's up, the bodyboarding and surfing are good, too. Frequent sunshine, grassy lawns, play equipment, and easy access add to the appeal, especially with families. The endangered Hawaiian monk seal often makes an appearance, and if you stop by just after sunset, you're likely to witness record numbers of protected green sea turtles coming ashore to sleep. (Please stay at least 10 feet away and do not photograph with flash.) Take a walk west on a path fronting numerous resorts. Note that at the time of writing, this beach is one of a few on Kauai that may institute a parking fee for nonresidents. Amenities: food and drink; lifeguards; parking (no fee); showers; toilets. Best for: snorkeling; sunbathing; swimming.

Tucked away in Lawai Valley, this collection of gardens includes lands and a cottage once used by Hawaii's Queen Emma (1836–85) for a summer retreat. Trams depart frequently to transport people from the visitor center to the gardens. The rambling 252-acre McBryde Garden has exhibits and easy trails to help visitors learn about biodiversity and plants collected throughout the tropics, including a Canoe Garden that features plants introduced to Hawaii by early Polynesian voyagers.  The biodiversity path in McBryde is accessible for people with mobility issues. The 100-acre Allerton Garden, which can be visited only on a guided tour, artfully displays statues and water features originally developed as part of a private estate. A famous scene in Jurassic Park was filmed here.

Reservations and closed-toe shoes are required for all tours. The visitor center has a high-quality gift shop and grab-and-go refreshments. Besides propagating rare and endangered plants from Hawaii and elsewhere, NTBG functions as a scientific research and education center. The organization also operates gardens in Limahuli, on Kauai's North Shore; in Hana, on Maui's East Shore; and in Florida.

When conditions are right, a natural blowhole in the rocky shoreline behaves like Old Faithful, shooting salt water high into the air and making a hollow echoing sound. It's most dramatic during big summer swells, which jam large quantities of water through the ancient lava tube with great force. Most sidewalk vendors hawk inexpensive souvenirs, but a few carry locally set South Sea pearls or rare Niihau-shell creations, with prices ranging from affordable to several thousand dollars. Look for green sea turtles bobbing in the adjacent cove.

This is a great beach to sit and people-watch as diving and fishing boats, kayakers, and canoe paddlers head out to sea. Shore and throw-net fishermen frequent this harbor as well. It's not a particularly large harbor, so it retains a quaint sense of charm, unlike Nawiliwili Harbor or Port Allen. The lawn is a good picnic and ball-tossing spot, and the bay is a nice protected area for limited swimming, but with all the boat traffic kicking up sand and clouding the water, it's not good for snorkeling. Outside the breakwater, there is a decent surf spot. Amenities: parking (no fee); showers; toilets. Best for: picnics; sunset; swimming.

The first hotel built in Poipu in 1962 overlooked this beach, adjacent to Poipu Beach Park. Actually, there's little to distinguish where this one ends and the other begins, other than a crescent reef at the eastern end of Waiohai Beach. That crescent, however, is important. It creates a small protected bay—good for snorkeling and beginning surfers. However, when a summer swell kicks up, the near-shore conditions become dangerous; offshore, there's a splendid surf break for experienced surfers. The beach itself is narrow and, like its neighbor, gets very crowded in summer. Amenities: parking (no fee). Best for: snorkeling; sunset; surfing; swimming.