Hidden Beach Caves and Grottos Worth Exploring

10 June 2025

Imagine stepping onto a secluded shore, feeling the salty breeze kiss your face, and discovering a mysterious opening in the cliffs—a hidden cave just waiting to be explored. Sounds like an adventure, right? Well, if you love uncovering secret spots that feel straight out of a storybook, you’re in for a treat.

From mesmerizing sea caves to enchanting grottos, the world is full of hidden gems tucked along coastlines. Whether you're a thrill-seeker or just someone who enjoys breathtaking scenery, these secret beach caves are a must-visit. Let’s dive into some of the most stunning hidden beach caves and grottos that should be on your travel bucket list.

1. Benagil Cave, Portugal

If you've ever scrolled through Instagram and stumbled upon a magical sea cave with a massive sunlit opening, chances are you’ve seen Benagil Cave. Nestled along Portugal’s Algarve Coast, this jaw-dropping cave is only accessible by boat, kayak, or paddleboard.

Why It’s Worth Visiting

- The natural dome ceiling has a giant hole, allowing sunlight to stream in, creating a surreal glow inside.
- The turquoise waters lapping at the golden sands make for a picture-perfect setting.
- Kayaking inside gives an up-close experience of the rock formations and textures.

Pro Tip: Go early in the morning to avoid crowds and catch the magical lighting inside the cave.

2. Cathedral Cove, New Zealand

New Zealand is known for its otherworldly landscapes, and Cathedral Cove is no exception. Located on the Coromandel Peninsula, this picturesque sea cave looks like something out of a fantasy movie.

What Makes It Special

- The cave itself forms a natural archway, framing the beach beautifully.
- It has been featured in movies like The Chronicles of Narnia: Prince Caspian.
- The walk to the cove includes stunning coastal views, adding to the adventure.

If you’re up for a scenic hike and some serious postcard-worthy views, this one's a must!

3. Blue Grotto, Italy

Italy’s Blue Grotto in Capri is what dreams are made of. This sea cave is famous for its glowing blue waters that look almost unreal. The secret? Sunlight passes through an underwater opening, creating an ethereal blue illumination inside.

Reasons to Add It to Your Itinerary

- A small wooden boat is the only way inside, making the experience uniquely intimate.
- The cave’s glowing blue light feels like stepping into a mystical world.
- The gentle waves and reflections make for an unforgettable boat ride.

Heads Up: You’ll need to lie flat in the boat when entering, as the entrance is super tiny!

4. Fingal’s Cave, Scotland

Unlike your typical sea cave, Fingal’s Cave on Scotland's Isle of Staffa looks like a work of art crafted by nature itself. With its geometric basalt columns, this cave is straight-up mesmerizing.

What’s So Captivating?

- The unique hexagonal rock formations make it look almost man-made.
- The cave’s acoustic properties create an eerie yet beautiful echo.
- It has inspired legends, poems, and even classical music compositions.

Fair Warning: The waters around the cave can be rough, so check the weather before planning a visit.

5. Cueva de los Tayos, Ecuador

Time for something truly off-the-beaten-path—Cueva de los Tayos in Ecuador is more than just a beach cave. It’s a vast underground system filled with ancient mysteries, rumored lost civilizations, and even NASA explorations.

Why It Stands Out

- Some believe it holds evidence of an ancient advanced civilization.
- It requires a guided expedition, making the adventure even more thrilling.
- Wildlife lovers will find the cave’s nocturnal birds fascinating.

If you're up for a real adventure full of mystery and history, this cave is calling your name.

6. Painted Cave, California, USA

California isn’t just about sunny beaches and Hollywood—it’s also home to the breathtaking Painted Cave on Santa Cruz Island.

What Makes It Amazing?

- It’s one of the largest sea caves in the world.
- The cave walls boast colorful hues, giving it a magical touch.
- During spring, waterfalls flow down the entrance, making the scenery even more spectacular.

Perfect for kayakers and adventure junkies looking for a unique experience!

7. Krubera Cave, Georgia

If going underground excites you, Krubera Cave is a must-see. Located in the country of Georgia, this is one of the deepest caves on Earth, reaching an astonishing 2,197 meters (7,208 feet) deep.

Why It’s Legendary

- It’s known as the "Everest of Caves" due to its depth.
- You’ll find underground waterfalls and mesmerizing rock formations.
- It’s an absolute paradise for experienced spelunkers.

This one isn’t for the faint-hearted, but if you love a challenge, it’s a bucket-list-worthy place!

8. Waianapanapa Sea Caves, Hawaii, USA

Hawaii’s beaches already feel like paradise, but the Waianapanapa Sea Caves on Maui take it to the next level. Set against the island’s famous black sand beaches, these caves are both stunning and steeped in ancient Hawaiian legend.

Why You Need to Go

- The contrast between the black lava rocks and the turquoise waters is striking.
- The caves hold centuries-old stories, adding a mystical touch to your visit.
- They’re part of a stunning state park with hiking trails and scenic views.

A mix of beauty and history—what could be better?

9. Ajuy Caves, Fuerteventura, Spain

Want to step back in time? The Ajuy Caves in Spain’s Canary Islands are estimated to be over 100 million years old!

What’s Unique About Them?

- The dramatic cliffs and dark rock formations make it a geological wonder.
- It’s one of the oldest formations in the Canary Islands.
- The waves crashing against the entrance create a spectacular show.

History buffs and nature lovers alike will find these caves fascinating.

Final Thoughts

Hidden beach caves and grottos offer a magical escape from the usual crowded beaches. Whether you’re looking to kayak into a sun-drenched cave in Portugal or explore ancient formations in Ecuador, there’s an adventure waiting for you.

So, grab your gear, embrace your inner explorer, and set out to discover these breathtaking natural wonders. Who knows? You might just stumble upon a hidden gem that isn’t even on the map yet.