Kauai, known as the “Garden Isle,” is the fourth largest of the Hawaiian Islands and one of the most lush and scenic destinations in the world. Its rugged cliffs, dramatic waterfalls, and pristine beaches are famous for attracting adventurers, nature enthusiasts, and tourists seeking relaxation.
Unlike its neighboring islands of Oahu or Maui, Kauai offers a quieter, more laid-back atmosphere, perfect for those looking to escape the hustle and bustle of mainland life. Kauai’s diverse landscapes range from the lush rainforests in the north, volcanic peaks, and valleys in the west to the sun-drenched beaches on its southern shores.
From the jaw-dropping vistas of the Na Pali Coast to the divine tranquility of hidden beaches, Kauai is a treasure introduced by ancient volcanic activity and maintained through centuries of natural evolution. It is home to some of the world’s most iconic landscapes and invites visitors to explore the true heart of the Hawaiian Islands.
Kauai is not only a destination for admiring natural beauty but also for taking part in memorable outdoor activities. Whether you’re hiking scenic trails, kayaking rivers, snorkeling in crystal-clear waters, or simply relaxing on the sandy beaches, Kauai has something for everyone. With so much to offer, let’s dive into the 21 best things to do in this tropical paradise.
1. Explore Waimea Canyon State Park

Waimea Canyon, also known as the “Grand Canyon of the Pacific,” is one of Kauai’s most famous landmarks. Stretching over 10 miles long and plunging to depths of more than 3,600 feet, this magnificent canyon paints a landscape filled with red, green, purple, and brown hues that create an artist’s dream.
As you explore Waimea Canyon State Park, you’re treated to multiple lookout points like Waimea Canyon Lookout and Puu Hinahina Lookout, offering dramatic panoramic views of the canyon’s steep cliffs and deep valleys. The layered shades of color, created by the oxidation of iron-rich volcanic soil and lush vegetation, make for a magnificent contrast against the bright sky.
Hiking enthusiasts will enjoy a range of trails with varying difficulty levels, perfect for both novices and seasoned hikers. A popular option is the Canyon Trail, which leads to the impressive Waipoo Falls, a two-tiered waterfall that stands at 800 feet, offering both beauty and tranquility.
The best time to visit Waimea Canyon is during the morning or early afternoon when it’s less crowded, and the sky is typically clearer, giving you perfect visibility. The colors of the canyon are particularly striking when illuminated by sunlight, enhancing its vibrant natural palette. Whether you’re on a casual driving tour, or hiking the canyon’s many trails, Waimea Canyon is undoubtedly a “must-see” during your trip to Kauai.
2. Take a Na Pali Coast Boat Tour

The Na Pali Coast is one of Kauai’s most awe-inspiring natural wonders, featuring towering sea cliffs that soar more than 4,000 feet above the crystal-clear waters of the Pacific Ocean. With its breathtaking palette of rugged cliffs, emerald valleys, waterfalls, and remote beaches, a boat tour along this coastline is one of the best ways to take in its beauty.
Boat tours provide a unique perspective on the full majesty of the Na Pali Coast—a landscape that’s nearly inaccessible by land. Visitors can choose from several types of boat tours, including adventure catamarans, sunset cruises, and snorkeling excursions. The snorkeling tours offer an added perk where you can swim alongside vibrant marine life like tropical fish, sea turtles, and even dolphins.
As the boat navigates through the sea caves and past cascading waterfalls, you’ll have plenty of photo opportunities to capture the moment. Keep an eye out for spinner dolphins, a frequent sight along these waters, and during the winter months, you may even catch glimpses of humpback whales as they migrate through the Hawaiian seas.
The serene beauty of the Na Pali Coast combined with the vibrant marine life makes a boat tour one of the most enriching experiences on Kauai. For the best experience, many recommend taking either a fully-guided sunset cruise or combining your tour with a snorkeling adventure to discover the underwater wonders beneath the rugged cliffs.
3. Snorkeling at Tunnels Beach
A snorkeling paradise enveloped in stunning underwater landscapes, Tunnels Beach (Makua Beach) is one of Kauai’s premier spots for exploring marine life. Its shallow reefs, formed by lava tubes, create a perfect environment for snorkeling, where locals and tourists often find themselves face-to-face with schools of fish, vibrant coral, and elegant Hawaiian green sea turtles.
Known for its crystal-clear visibility, Tunnels Beach offers a unique opportunity to witness the undersea beauty that characterizes Hawaii. Divers and snorkelers can explore underwater lava tubes, which are home to colorful marine species like butterflyfish, surgeonfish, and parrotfish.
Beyond its underwater attractions, the beach itself provides a picturesque view of the towering Makana Mountain, also known as Bali Hai from the movie South Pacific. The scenic backdrop and calm shores make Tunnels Beach not only a great snorkeling spot but also an ideal place for relaxation and sunbathing.

For the safest snorkeling conditions, visit during the summer months when the surf is gentler, ensuring calmer waters. Be mindful of ocean conditions, and always check the weather and tide reports before heading out. With its diverse marine life and stunning surroundings, Tunnels Beach is a haven for both beginner and experienced snorkelers.
4. Relax at Poipu Beach Park

