About 33 km (20 mi) off the coast of Brazil, near the state of Sao Paulo, there’s a place so dangerous that it’s uninhabited and closed to visitors or tours. Ilha da Queimada Grande, also known as ...

The karst caves of north-western Puerto Rico in the Caribbean are home to a surprisingly large array of animals. Some of these creatures are small. Cockroaches and other bugs scuttle from nook to ...