Far below the surface of Mexico’s Yucatán Peninsula, a flooded labyrinth of limestone tunnels has quietly guarded one of the most haunting fossil troves of the Ice Age. In the darkness of a submerged ...

Hidden beneath the surface, a pristine underwater cave can preserve traces of vanished worlds with a clarity that dry land rarely matches. In the still water and sealed chambers, sediments, bones, and ...

One lesson learned from spending more than two years in a pandemic: don’t leave your bucket list for your later years. It’s time to embark on that big adventure. According to an American Express ...

For centuries, this spectacular underworld recorded the local climate and entranced visitors. Now its fairy-tale features are receding, drip by drip. SCHWARZMOOSKOGEL (AUSTRIA) Photographer Robbie ...

Beneath the surface of Europe’s most enigmatic mountains lies a hidden world that will take your breath away—then freeze it in an instant. Caves—formations made in soluble limestone, gypsum, and ...