The Columbretes Islands, located off the coast of Oropesa del Mar in Spain, are a hidden gem of the Mediterranean Sea. These islands, consisting of four volcanic islets and a few rocky outcrops, are a protected nature reserve that is home to a wide variety of flora and fauna.

The Columbretes Islands were formed around 4 million years ago, when a series of volcanic eruptions occurred on the sea floor. The result was the creation of a group of volcanic cones that rose up from the depths of the sea. Over time, the cones eroded and the islands emerged above the surface of the water. Today, the largest of the islands, Illa Grossa, stands at 67 meters above sea level.

The islands are surrounded by crystal-clear waters that are teeming with marine life. Diving and snorkeling enthusiasts come from all over the world to explore the underwater caves, canyons, and reefs that surround the islands. The waters around the Columbretes Islands are home to an incredible diversity of marine life, including octopuses, moray eels, barracudas, and colorful schools of fish.

On land, the islands are equally rich in flora and fauna. The Columbretes Islands are a protected nature reserve, which means that visitors are only allowed to explore a small portion of the islands. However, even this limited access is enough to experience the unique beauty of the islands. Visitors can explore the rugged terrain and discover the many species of plants and animals that make their home on the islands.

One of the most unique features of the Columbretes Islands is the presence of a large population of sea birds. The islands are home to over 20 different species of birds, including gulls, shearwaters, and cormorants. Visitors can observe these birds in their natural habitat, and if they are lucky, they may even catch a glimpse of the rare Eleonora's falcon.

The Columbretes Islands are also rich in history. The islands were first inhabited by humans in the 19th century, when a lighthouse was built on Illa Grossa. The lighthouse, which is still in operation today, is a popular spot for visitors who want to take in the stunning views of the surrounding sea.

In addition to the lighthouse, there are several other historical sites on the islands, including an old quarantine station and a military fortification. These sites offer a glimpse into the islands' past and the many uses that they have served over the years.

Visitors to the Columbretes Islands can reach the islands by boat from the nearby town of Oropesa del Mar. There are several boat tours available that offer visitors the chance to explore the islands and learn more about their history and ecology. The boat tours are typically led by knowledgeable guides who are passionate about the islands and eager to share their knowledge with visitors.

Overall, the Columbretes Islands are a must-see destination for anyone who loves nature, history, and adventure. Whether you are an experienced diver, a birdwatcher, or just someone who enjoys exploring new places, the islands offer something for everyone. With their stunning natural beauty, rich history, and unique ecology, the Columbretes Islands are a true hidden gem of the Mediterranean Sea.