The world's most beautiful waterfalls offer a glimpse of nature's awe-inspiring artistry ... Loa Observatory in Hawaii recorded the largest spike in atmospheric carbon dioxide (CO2) concentrations in ...

Some even have multiple waterfalls to find! Plus, they're nearly guaranteed to be exceptional, since each hike has been selected from AllTrails' top-rated Arizona waterfall hikes list (filtered by ...

Some of top Oregon waterfalls are easily accessible via a short walk from a paved parking lot, while others require a more rigorous trek to reach. Read on to discover the top Oregon waterfalls.