While "prettiest" is subjective, in 2026, the Arenal Volcano region and the Manuel Antonio National Park are the top contenders for the most visually stunning locations in Costa Rica. Arenal offers a dramatic landscape of a near-perfect conical volcano rising above lush, misty rainforests, complete with steamy hot springs and the vibrant blue waters of Lake Arenal. For those seeking coastal beauty, Manuel Antonio features a breathtaking combination of white-sand "crescent" beaches, turquoise Pacific waters, and jungle-covered cliffs teeming with monkeys and sloths. Another rising star for 2026 travelers is the Osa Peninsula (Corcovado), which offers a "wilder" and more pristine beauty that many consider the crown jewel of the country’s biodiversity. If you prefer a mystical atmosphere, the Monteverde Cloud Forest provides an ethereal landscape of moss-covered trees and rare quetzal birds shrouded in permanent fog. Each region offers a different "palette" of beauty, from the volcanic reds and greens of the north to the vibrant blues and golds of the Pacific coast.