From a Polynesian island ringed by blue lagoons to Chile's gaucho heartland, these are BBC journalists' top destinations this year. We love Dubrovnik – but so does everyone else. Yet, many visitors to Croatia may not know that nearby Montenegro is also home to beautiful seaside settlements, plus new hiking trails that connect mountain communities. Across the water from always-trendy Buenos Aires, Montevideo offers similar world-class tango, steaks and architecture, and is one of South America's greenest cities. And while Rome may be eternal, Algeria's got the ancient ruins without the crowds. In this year's guide to the best places to travel, we're highlighting destinations that offer incredible experiences while using tourism to support local communities, protect the environment and preserve their unique cultural heritage. To compile our list, we tapped BBC staff, our trusted journalists and some of the world's leading sustainable travel authorities to id...