Seamounts generally form when volcanic mountains rise up from the seafloor ... bouncing off the sub in every direction. A black-and-white manta ray flexes its wings and soars past for a look.

With a richly diverse natural landscape—from the vertiginous mountain peaks of the Caucasus to the balmy rainforests of the Black Sea-fronted Adjara region—the country of Georgia offers ...

And yet few international travelers make the journey to, much less know anything about, Turkey’s Black Sea ... by rising mountains. On the shore, the twin-minareted white Uzungöl mosque appears ...