Carved out of rock cliffs that date back as many as 75 million years, ... Pass two sets of private steps to homes above, and the sea cave will appear. Duck inside to find a maze.

In December 2016 a large lava delta formed by Kilauea volcano sank into the sea, exposing the mouth of a lava tube. A lava delta is created when molten rock reaches a flat area and spreads out in ...

Beneath the Yucatan Peninsula's surface in Mexico, a hidden natural wonder stretches out of sight. Sistema Sac Actun, the ...

Two 325-million-year-old ctenacanth shark fossils discovered in Mammoth Cave shed light on ancient marine ecosystems.

The coast is also home to Sea Lion Caves, a must-visit destination along Highway 101 for children and adults alike that boasts a 4.4-star rating on Google and recommendations from top travel critics.

Archaeologists exploring the cave removed the boulder and discovered the rock was "literally splitting" a human skeleton in half. Latest U.S.

Instead, the team discovered a hard-to-access crevice in the remote cliffs overlooking the sea. Inside were swords determined to be 1,900 years old, which the experts believe were once hidden by ...

The village in question is Porís de Candelaria in the municipality of Tijarafe – in the northwest of the island – and is located hidden inside a natural cave.

An ancient, submerged bridge in a cave on the Spanish island of Mallorca is helping researchers determine when humans first settled on islands across the western Mediterranean Sea thousands of ...

Ancient humans built a bridge inside a cave on Mallorca nearly 6,000 years ago ... The bridge was likely used for 400 to 500 years before rising sea levels caused the cave’s lake to cover the ...

Deep inside a pitch-black cave in Kentucky, researchers discovered a new species of ancient sea creature, according to the National Park Service. It left little to find, just strange teeth ...

Deep inside a pitch-black cave in Kentucky, researchers discovered a new species of ancient sea creature, according to the National Park Service. It left little to find, just strange teeth ...