Ready to start planning your next family adventure? Here are 11 of the best affordable family-friendly vacation spots in the US that offer great experiences at just as great a value.

Not all hydrothermal features at Yellowstone are the same, either. While many of the popular hot springs and geysers are closer to neutral or alkaline, other features are notably more acidic, ...

Watkins said about 14 million people from other countries visit a national park each year. If they paid a $25 surcharge the parks system could raise around $330 million annually.

FANCY WATCHING a game of football on the side of an active volcano?Or maybe you would prefer the 90-minute experience of sitting high up a mountain pa ...

What is carbon dioxide and how is it connected to climate change? Carbon dioxide (CO 2) is a colorless, odorless greenhouse gas produced by numerous natural processes and by human activities such as ...

Outside of August, they’re quiet too. Expect peaceful hikes to secret beaches along cactus-scattered cliff-side paths or, for something more extreme, head 400m up fumarole-topped Stromboli.

This map doesn’t just show you where you are – it reveals an entire playground of natural wonders waiting to be explored in Northern California. Photo credit: May A. This isn’t one of those hikes ...

Acidic features tend to be the fumaroles (gas vents), mud pots, and frying pans, which are all dominated by the release of acidic gases. One of the most acidic front-country features in the park is ...

It’s the hydrothermal features within Lassen Volcanic National Park that give evidence that it is an active volcano. Fumaroles that give off steam and volcanic-gas vents, mudpots, boiling pools and ...

Outside of August, they’re quiet too. Expect peaceful hikes to secret beaches along cactus-scattered cliff-side paths or, for something more extreme, head 400m up fumarole-topped Stromboli.