By venturing into the 30-million-year-old limestone caves on New Zealand’s North Island, photographer Joseph Michael was able to capture magical images of the glowworms that call this place home. Against the natural backdrop that the cave provides, it looks as though there are hundreds of miniature, blue-tinted stars, but this is actually the work of glowworms known as Arachnocampa luminosa.
Jeita Grotto, Nahr al-Kalb Valley, Lebanon. Eighteen kilometers northeast of Beirut, these underground limestone caves were inhabited in prehistoric times and continue to attract human visitors with their vivid colors and stalactite formations. The biggest stalactite in the world is here. The caves consist of a network of chambers -- with an upper and a lower gallery -- stretching out for nine kilometers and accessible by an underground river.
Puerto Rico is graced with a wealth of fantastic beaches, year-round sun, limestone caves and opportunities for diving, snorkeling and surfing as well as a multitude of cultural experience, not to mention amazing food and world-class rum. If you plan on visiting this lush U.S. territory (no passport required!) in the northeastern Caribbean, be sure to visit its very best places, including these.