One of Costa Rica 's richest and most varied parks, Rincon de la Vieja was created in 1973 to protect the extensive flora, fauna and watersheds around the area. 32 rivers issue forth down the flanks of this volcano, making its ecological importance impossible to overestimate. Altitudes and climates vary significantly within the park, leading to a great degree of biodiversity within its borders. Hundreds of species of birds have been identified, as well as mammals of all sizes.

Visitors have numerous options and ranges of activity within the park's two sectors. Rincon--“Las Pailas”—or the cauldrons—are so named for the major amount of geothermic activity found within this portion of the park. This is a virtual wonderland of geysers, fumaroles and splattering, steaming mud pots whose sizes vary seasonally. This boiling, mineral-rich mud is said to have rejuvenating powers, but the area is restricted due the instability of the surface. Luckily there are private reserves nearby that have smaller deposits of the smooth paste, where visitors can apply a face mask under more restful conditions. This portion of the park also contains swimming holes and waterfalls, both of which are perfect spots to relax and take in the surroundings after the long hike. Rincon— Santa Maria , offers visitors hiking options through the transitional areas between dry forest and cloud forest. The longest trails within the park lead up to the craters themselves, where the vistas open onto rocky, windblown volcanic terrain. A guide is recommended when hiking at these altitudes, as the mists can arise quickly, cutting the return paths off from view.

Due to its size and diversity, at least two days are required for a thorough investigation of the park. No lodging is available within the borders, but a variety of small hotels built in the traditional hacienda style can be found nearby, in some cases situated on their own private reserves. An excellent example is found in Hacienda Lodge Guachipelin. Built on more than 1500 hectares , the reserve contains such treasures as mud pots and hot mineral springs, waterfalls and tranquil pools, and an amazing section of the Rio Blanco, in which rock formations along the sides look like a view into nature's paint box. All the reserve's sites can be visited by horseback with knowledgeable local guides, making getting there part of the adventure!

The largest of Costa Rica 's provinces, Guanacaste's coastline is sized proportionally. Stretching from the border of Nicaragua down to the mid-Pacific region of the province of Puntarenas , it also dips down into the Peninsula Nicoya, ending near Playa Caletas. Within this expanse lie an innumerable variety of beaches, from nine protected wildlife areas, to sandy coves suitable for nearly any taste.

Playa Panama would be a good place to start an exploration of the Northern Guanacaste coastline. The sheltered waters that enter the Puerto Culebra lap into tide pools and beautiful beaches lined with shade trees, providing just the secluded spot for a picnic. Playa del Coco is the “in place” for both night life and sea faring excursions, but these activities can also be found in Playas Ocotal and Hermosa, as well as the numerous beaches along the coast. Playas Pan de Azucar down to Playa Conchal offer sandy beaches that range from a rich coral to pale gray, and it's difficult to resist the inclination to relax and take in the sun, or walk along the shoreline searching for sea treasures. Marine birds and iguanas are abundant—and neither seems to mind sharing the beach with visitors.

Wildlife and white sandy beach seem to blend perfectly in places such as Tamarindo, where mangroves and estuaries offer plentiful opportunity for communing with nature, as well as a chance to just unwind. And heading further south in the Peninsula Nicoya, there are even more choices for absorbing nature's bounty. The many protected coastal reserves in the area maintain an abundance of marine birds and mammals, as well as some of the most important turtle nesting sites on the Pacific coast. Playas Nosara, Pelada, Samara and Carillo are destinations not to be missed, but there are so many options that any choice would provide an unforgettable time.

Guanacaste is famous for sun and sand, and that's exactly what visitors will find along its coastline. A full range of water sports are available for novice and expert alike—from deep-sea fishing, sea kayaking, and surfing, to snorkeling and scuba diving. Several PADI approved programs can be found in the region for those wishing to take classes or simply arrange for a dive. Those ready to slip under the waves are likely to encounter an extensive array of marine life, including huge manta rays, white tipped reef shark, and a rainbow variety of tropical fish. An unusual aspect to the beaches in the province is the combination of types of hotels within relatively small distances. In places like Flamingo, large, all-inclusive hotels might rise up beyond the sand, but the beach itself is lovely and untouched. Other, beaches, such as Playa Junquillal, offer visitors tide pools large enough for snorkeling. This range of sandy and rocky beaches, and large luxury hotels or tiny bungalows ensures that every visitor will find their perfect spot in the sun.