With a competent guide, active volcano treks are both safe and worth the climb. Here are some of the tallest active volcanoes ...

This 2023 astronaut photo shows three glaciers merging into a single massive ice mass in the Karakoram mountains. The stripy ...

Residents are wearing masks to protect themselves from thick volcanic ash that is blanketing several Indonesian villages as rumbling Mount Lewotobi Laki Laki erupted for a second straight day. The ...