We may receive a commission on purchases made from links. Southern California is a treasure trove for off-the-beaten-path ...

standing directly underneath the mouth of Fern Grotto Beach’s sea cave. The cave is carved into the beach’s sandstone cliffs, just below an underground spring that provides the aforementioned ...

WITH calm waters, soft sand and sheltered sunbathing spots – this Irish beach is the perfect spot to soak up the sun. ...

Follow a fearless team of scientists as they venture into blue holes—underwater caves that formed during the last ice age, when sea level was nearly 400 feet below what it is today. These caves ...

This stunning snorkeling and scuba spot in Maui is the perfect place for spotting marine life, and experienced divers can ...

They started with their father when they were teens growing up in South Dakota’s Black Hills, where the ponderosas reach over 230 feet into the air and the caves stretch over 830 feet underground.