On a new free-diving tour in South Africa, one traveler comes face-to-face with seals, shipwrecks, and the limits of her own endurance.<div class="media_block"><a href="https://www.travelandleisure.com/thmb/MtOcMUi8ppjS9vd1CAsA2Xi7qFI=/filters:no_upscale():max_bytes(150000):strip_icc():format(jpeg)/TAL-roushanna-gray-freedive-veld-and-sea-CAPETOWNFREEDIVE1125-bc0d2ae7d33944b28fa3c90a8629eac0.jpg"><img src="https://www.travelandleisure.com/thmb/MtOcMUi8ppjS9vd1CAsA2Xi7qFI=/filters:no_upscale():max_bytes(150000):strip_icc():format(jpeg)/TAL-roushanna-gray-freedive-veld-and-sea-CAPETOWNFREEDIVE1125-bc0d2ae7d33944b28fa3c90a8629eac0.jpg" class="media_thumbnail"></a></div>
On a new free-diving tour in South Africa, one traveler comes face-to-face with seals, shipwrecks, and the limits of her own endurance.