Cancun, on the Yucatan peninsula, is one of Mexico's most visited cities, while nearby Mayan villages struggle with poverty and lack of economic opportunities. A newly proposed train line could help fix that, but at what cost to the people and ecosystem?
Right whales have followed a type of plankton to waters further north — putting them into highly trafficked shipping lanes. Of 20 whales found dead in the past two years, seven appear to have been hit by ships.
Summer camp for youngsters began in the late 1800s as an escape from urban industrialization. Nowadays, traditional summer camps offer a respite from technology and an opportunity to use nature as a classroom.