Marino Ballena National Park

From the hills above Uvita the shape is unmistakable: a sandbar shaped exactly like a whale's tail, fanning out into the Pacific and fully exposed only at low tide. Ticos named the park after what the water does, not just what swims in it. You can walk the Punta Uvita sandbar on foot when the tide table allows, sand underfoot where an hour earlier there was surf, with Bahía on one side and the open Pacific on the other — a piece of geography that behaves like a magic trick twice a day.

The real whales arrive on a schedule the sandbar only hints at. Southern-hemisphere humpbacks migrate up from Antarctic waters roughly July through October; a separate northern-hemisphere population arrives from December through March — giving Marino Ballena two distinct whale seasons where almost everywhere else on Earth gets one. Boats leave from Playa Uvita to find mothers nursing and breaching with their calves in the calm water the tail-shaped bay creates, while the reef beneath protects some of the richest coral on this coast.