For the past two years, summer in Spain has meant prominent protests against tourism: holidaymakers being drenched by angry locals armed with water pistols in Barcelona and protesters marching under b ...

When marine biologist Marianne Nyegaard went on a diving holiday to Bali, she did not realise it would set her on a path ...

Discover the 17 most spectacular sea caves in the world and learn why people love them so much, including how you can visit them.