Nature places in Caribbean
You will hear the blowhole Boca del Diablo before you see it. A loud and heavy breathing by a beast from the underworld. In reality, it's a natural channel in the rocks, where the sea get rush through and pushed through an opening on top of the rocks. Depending on how rough the sea is, the fountain will either be like a massive geyser or just a cloud of spray. To reach Boca del Diablo, either walk from Playa Frónton or drive along the dirt road which runs along the pretty limestone cliff and pass a marble quarry. Ask locals for direction.
One could classify waterfalls into 2 categories: there are powerful, blow-you-away falls, and there are chilled out bathing in the mist kind of falls. In the middle of the tropical forests, across streams and over hill lies El Salto del Limon. Any trip to the lesser visited Samaná Peninsula will almost certainly involve a trip to the falls. Getting there can be half the fun as most visitors opt to hire a horse to navigate the rather muddy and wet trail. Once there, although you won't be alone, going for a bit of a swim and showering in the picturesque falls is a wonderful reward after the trek here.
A boat safari on the Black River will take you a bit up river through the mangroves of the Great Morass. There will various birds and of course the main sight, the crocodiles. According to the guide there should be about 400 crocodiles in the river system, but you will probably only see the usual suspects, which all have names like Margaret, Tom and Jerry.
Luminous Lagoon, also called Glistening Waters, is a lagoon where the water glow blue-ish when disturbed at night due to microorganisms. You can see this natural phenomena a few other places in the world, but this is definitely one of the best locations - and it's always here (except when it rains heavily). It’s an unreal sight when you first see the vibrant green-blue glowing trace the boat leaves. The boat ride into the middle of the lagoon is rather short, so it won't take long before you are having your most (drug free) psychedelic swim ever.
Sault Waterfall is considered to be the most scenic waterfall in St. Lucia. It's about 20 m high, thought nobody seems to have measure it, and drops into a nice pool, before it flows down some rocks and into the river. During winter (dry season) the cascade might have been reduced to no more than a dribble. Though it's a known waterfall for locals and tourists alike, you rarely meet more than a handful of other people here. To find Sault Waterfall head inland from Dennery, pass the Zip-line adventure park, a few hundred meters down the road a shelter will mark the start of the trail. The hike into the waterfalls takes no more than 10 min.
Technically, it's a volcano crater but the only thing you see are some bubbling mud pools and white smoke – in addition to the sulphur smell. The volcano's last eruption was in 1700s and is considered to be dormant today. For an additional fee, it's possible to take a dip in the hot spring which are rich in minerals and believe to be good for your body. However, if you hit the crowds from the cruise ships, you will be in for a wait.