A 21st century gold rush has brought lawlessness and destruction to the once pristine Madre de Dios region of Peruvian rainforest. Environmental organisations estimate that more than 40 tons of mercury are dumped every year in the region.

From strange alien landscapes to the Gates of Hell, here are 10 natural wonders you might not have heard of.

The world biggest garbage dump is a floating one and has twice the size of the USA.

See maps of the latest earthquakes in the last 7 days. Maps of USA regional and world regions. Located by USGS and contributing agencies.

A catalog of NASA images and animations of our home planet. Agriculture, atmosphere, aerosols, sea ice, environmental impacts, water quality, erosion/sedimentation, visible wavelengths, solar activity, tectonics, sun-earth Interactions, and more.