Castlewood Canyon State Park in Franktown, Colorado is one of those places that makes you do a double-take and wonder if someone forgot to tell you that Colorado secretly contains portals to Mars.

If someone showed you photos of Onyx Cave without context, you’d probably assume they were concept art from the latest space ...

From waterfalls that seem to disappear into nowhere to blood-colored water, these places are shrouded in mystery-even if science can explain most of them.

Although astronomers have found thousands of exoplanets, the number of confirmed exomoons—and exorings—is still zero. But ...

A "gravity hole" beneath Antarctica is offering scientists a rare glimpse into Earth's deep interior, a dynamic record of slow-moving processes that have been reshaping our planet for tens of millions ...

Are aliens real? The question has animated conspiracy theories for decades and enthralled at least one former president of the United States. In a recent interview, Barack Obama became the first ...

When we dream of landscapes, we might imagine rolling valleys or rugged mountains. But there is a whole landscape hidden from human view: the secret world of the seafloor.

From fossil-filled cliffs to hidden cave mosques, Mangystau offers a rare journey through nature, history, and culture. View on euronews ...

President Donald Trump said criminal illegal aliens being removed from the U.S. are so violent, they "make the Hells Angels look like the sweetest people on Earth," arguing tougher border enforcement ...

After years of crossing state lines, collecting passport stamps at national parks, and discovering hidden corners of America, I've finally visited all 50 states. The journey revealed something ...

Clairvoyant Baba Vanga, long believed by devotees to have foreseen events such as 9/11 and the COVID-19 pandemic, predicted alien visitors and the outbreak of World War III for this year. The blind ...