View of Rumeli Fortress in İstanbul, Türkiye with a Turkish flag on a cloudy day.

Rumeli Fortress in İstanbul with Turkish Flag

A black and white view of Cape Coast Castle in Ghana, highlighting its historic architecture.

Clouds over Cape Coast Castle in Ghana

Concrete breakwater structures along Tallinn coast with ships on Baltic Sea horizon.

Wooden barriers line a serene coastal beach, capturing gentle sea waves and tranquil tides.

A weathered lighthouse stands on a rocky breakwater against stormy seas and an overcast sky.

Concrete blocks at the shoreline protect against erosion, calm sea in view.

Scenic view from Bozcaada Castle with a stunning sea backdrop and historical stone walls.

Concrete wave breakers piled on Ventspils shore under a sunny blue sky.

A tranquil beach with geometric breakwaters along the coast under a clear sky.

Stunning aerial shot of a lighthouse on a small island, surrounded by turquoise ocean waters.

Stunning aerial view of a rocky shoreline with waves crashing in Balok, Malaysia.

Barbed wire fence near ocean coast with city skyline in the backdrop on a cloudy day.

A sunlit wall of a historic fortress overlooking the sea in Cádiz, Spain.

Ancient fortress with stone walls and tower by the sea. A travel destination.

Captivating view of the Citadel of Qaitbay, a historic fortress in Alexandria, Egypt.

Capture of the ancient Kizkalesi Castle on a tranquil Mediterranean island in Mersin, Türkiye.

Concrete breakwater stretching along the calm sea with a clear sky, offering tranquility and protection.

A beautiful coastal village set against a lush mountain range by the sea.

Navy destroyer and submarine docked in a tropical harbor with palm trees framing the scene.

Sea waves crash against moss-covered concrete tetrapods at Mumbai's shoreline, India.

Close-up image of concrete tetrapods used for coastal protection and wave dispersion.

Pile of concrete tetrapods used for coastal protection in West Java, Indonesia.

Stone fortification tower at Porto's coast under a clear blue sky.

Two people walk on a beach past weathered wooden breakwaters in Saint-Malo, France.