Three vacation destinations in and near Europe boast both world-class wreck diving and vibrant on-land attractions.

Splendid wrecks, saltwater lakes, natural cathedrals and more await divers along Croatia’s northern, central and southern coasts.

Portugal delights above and below the waves, from castles to wrecks and reefs to restaurants.

Here’s what time of year Croatian dive centers are operating, how to get around the country, what gear you need and more.

Warming waters are pushing southern fish to increasingly expand to the Mediterranean’s northern waters. Divers across the region are supporting scientists with the data they need to study how climate change is transforming life distribution in the sea.

Researchers are racing to complete digitization of ancient cave art in a submerged Mediterranean cavern as rising sea levels and plastic pollution threaten to scrub them from the annals of history.

Tips for the first-time or return visitors, plus under-the-radar ideas and events for your next trip to these classic dive destinations.

Get your heart beating and blood flowing when you dive any of these high-octane sites from Egypt to French Polynesia.