Bundle up for a stroll along this romantic hiking trail in Pennsylvania this Valentine's Day. Cross footbridges and pass streams on your way to a waterfall.

Blood Falls in Antarctica flows unpredictably with iron-rich, salty water. Microbes inside survive without sunlight.

County Durham has been a prime filming location for numerous films and TV series, thanks to its rich history and landscapes.

Kayaking in glowing waters is a hot, new travel trend. Here's a collection of destinations in America to scope out the natural phenomenon, from Texas to California and more.