© Istockphoto|Angel's Billabong, Nusa Penida, Bali

© Istockphoto| Kuang Si, Luang Prabang, Laos

© Istockphoto|Las Grietas, Isola di Santa Cruz, Galapagos

© Istockphoto| Cenote di Ik Kil, Yucatan, Messico  

© Istockphoto| Parco Nazionale di Erawan, Thailandia 

© Istockphoto| To Sua, Upolu, Samoa 

© Istockphoto| Sinkhole di Bimmah, Oman 

© Istockphoto|Blue Lagoon, Reykjavík 

© Istockphoto|Laghi di Plitvice, Croazia  

© Istockphoto|Terme di Saturnia,  Italia