Spend a full day exploring Gramvousa’s hilltop Venetian fortress and the pale, shallow waters of Balos Lagoon. This open-deck cruise from Castelli packs swimming, history, and sweeping western-Crete views into one long, rewarding day.
More ways to explore the area's outdoor wonders
A salt-bright wind lifts off the sea as the passenger liner slips out of Castelli at first light. On deck the Bay of Balos reveals itself in bands of turquoise and indigo—locals say you can count a dozen shades between horizon and shore. Sixty minutes of open water separates the harbor from Gramvousa, a small rock crowned by a weathered Venetian fortress where gulls wheel and the view runs uninterrupted to the ragged spine of western Crete.
Difficulty
moderate
Duration
12–16 hours
Fitness Level
Suitable for travelers in average fitness—able to manage a 15–20 minute uphill walk and swimming in open water.
Wildlife
History
The Venetian fortress on Gramvousa was built in 1597 as part of Crete’s coastal defenses; later, the island’s coves were used by corsairs and local fishermen.
Conservation
Balos’ shallow lagoon and surrounding Posidonia seagrass are ecologically sensitive—avoid trampling dunes, take any trash back on the boat, and use reef-safe sunscreen.
Reserve your spot on the Gramvousa Island & Balos Lagoon today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Take seasickness meds early
Boat crossings are exposed—if you’re prone to motion sickness, take medication at least 1 hour before departure.
Sturdy footwear for the fortress
The path to the Venetian fortress is uneven stone—light hiking shoes or firm sandals protect ankles and toes.
Bring water and snacks
Facilities at Balos are limited; pack 1–2 liters of water and portable snacks to avoid long queues or dehydration.
Respect the lagoon
Avoid walking on dunes or disturbing Posidonia beds; use marked paths and leave no trash on the beach.
Reusable water bottle
Hydration is critical on a long day in sun and wind.
Sturdy sandals or approach shoes
Protects feet on rocky fortress paths and coarse sand.
summer
Light waterproof/dry bag
Keeps phone, wallet and spare layers dry during the boat ride.
Reef-safe sunscreen & hat
UV protection for extended sun exposure on open deck and beach.
summer