• Tagged Blue Grotto, Capri, cave, Grotta Azzurra, Italy

Bewitched by the otherworldly beauty and glowing blue waters in the Blue Grotto sea cave, we scoured the web looking for more. We found out it was a favorite spot for a Roman emperor, has inspired artists for hundreds of years, and has become a huge tourist attraction on the Isle of Capri. [32 Photos]

• Tagged Apostle Islands National Lakeshore, cave, ice, ice caves, Lake Superior, sea caves, snow, winter, Wisconsin

There’s at least one great thing about super frigid weather, at least if you are near Apostle Islands National Lakeshore where sea caves have been transformed into ice caves. For the first time in five years, Lake Superior is so solidly frozen that people are coming from all over the world to walk on water. The phenomena has transformed the Wisconsin winter wonderland into a hot tourist destination. [32 Photos]

• Tagged adventure, arched bridge, Ash Cave, bridge, bridges, Broken Rock Falls, cave, caves, Cedar Falls, Conkle's Hollow, Devil's Bathtub, forest, gorge, hiking, Hocking Hills, Hocking Hills State Park, nature, Ohio, Old Man's Cave, rock climbing, rocking climbing, rocks, State Park, trails, waterfalls, woods

In Ohio, there is a gorgeous State Park that has undisturbed forests, cascading waterfalls, rugged cliffs, deep recess caves and mysterious gorges. The 2,356-acre Hocking Hills State Park is a place of adventure for nature lovers. It is embedded in Hocking State Forest and its three nature preserves includes Conkle’s Hollow. The park is divided into these five separate sections: Old Man’s Cave, Cedar Falls, Ash Cave, Cantwell Cliffs and Rock House. Hocking Hills State Park is about 3 hours away from Cuyahoga Valley National Park, the 10th most visited U.S. National Park in 2011. Both must be gorgeous in the fall season with the changing colors of autumn foliage, but we were struck by the beauty of the “greeness” at Hocking Hills. [47 Photos]

• Tagged Baatar, Baatara abyss, Baatara gorge, Baatara gorge waterfall, Baatara Pothole, Baatara waterfall, cave, cavern, gap of three bridges, hike, Lebanon, Lebanon Mountain Trail, mountains, natural bridge, nature, phenomena, Stairway to Heaven, Tannourine Cedars Forest Nature reserve, Tannourine Falls, Three Bridges Chasm, Three Bridges Chasm in Balaa, waterfall, waterfalls

In Lebanon, the beautiful Baatara gorge waterfall cascades 837 feet (255 m) down in a thunderous roar during spring as the snow melts. Although a sign cautions not to climb around too close to the possibly slick edges at the risk of slipping and plunging to your death, nothing prepares a person to be so in awe of nature as the cavern opens up to house magnificent three-tiered natural bridges. This wonder of nature is also called the “Cave of the Three Bridges,” an abyss, “Three Bridges Chasm”, sinkhole, “pothole” and “hole in the wall.” During spring and early summer, the wildflowers are in full bloom making it a great time to hike the Tannourine Cedar Forest Reserve, part of the Lebanon Mountain Trail, that takes adventurers to the immense and breathtaking Baatara gorge waterfall. [31 Photos]

• Tagged adventure, cave, cavers, caving, exploration, extreme sports, Hang Son Doong, karst, Phong Nha Cave, Phong Nha-Kẻ Bảng, Phong Nha-Ke Bang National Park, Phong Nha–Kẻ Bàng karst, Son Doong Cave, stalactites, stalagmites, Thien Duong Cave, Tien Son Cave, Vietnam

Hidden in the thick tropical forest of Vietnam is a land of phenomenal caves. Phong Nha-Ke Bang National Park contains the oldest major karst area in Asia; the karst is believed to have formed 400 million years ago, during the Palaeozoic era, With every cave discovery, that cave is considered the largest and longest in Phong Nha-Ke Bang, only to learn later that yet another even more massive cave has been found. This national park is home to the largest cave in the world and is said to be the home of the many of the world’s most beautiful caves. It’s famous for its cave and grotto systems, about 300 caves and grottos, of which only 20 have been surveyed by Vietnamese and British scientists. UNESCO named it a World Heritage Site for its geological values. Spectacular stalactites and stalagmites create an underground fairy-tale-like world where formations look like the caves possess jagged teeth or home to strangely alien trees. Visitors to Phong Nha-Ke Bang National Park most often visit the massive Paradise Cave and huge Phong Nha Cave as seen below. If you don’t expect to ever travel to Vietnam, then here is a virtual trip to see the mysterious and massive world hidden beneath Phong Nha-Ke Bang National Park . [39 Photos, 2 Videos]

• Tagged adventure, Beaver Marsh, biking, Blue Hen Falls, Brandywine Falls, cave, Cuyahoga Valley, Cuyahoga Valley National Park, hiking, ledges, National Park, nature, Ohio, places, Ritchie Ledges, rock formations, train, travel, waterfall, waterfalls, wildlife

Coming in as the 10th most visited national park in 2011 is Cuyahoga Valley National Park in northern Ohio. It offers adventurers a little bit of everything in the 20,339 acres of woods, water, wildlife and even caves. There are nearly 200 miles of trails within the park for visitors to hike, bike or for horseback riding. The Cuyahoga River, meaning ‘crooked river’ in Mohawk, is fed by more than 190 miles of other waterways to tempt fishermen of all ages. Millions of years ago, water etched out the 105-foot high sandstone Ritchie Ledges and Ice Box Cave, also carving other wonderful rock formations. More than 2 million visitors came to Cuyahoga Valley National Park last year to enjoy the wooded ravines, gentle rolling hills, 170 waterfalls, historic railway, buildings and paths. Welcome to Ohio’s only national park, welcome to Cuyahoga Valley National Park! [40 Photos]

• Tagged Argentina, cave, Chile, environment, General Carrera Lake, labyrinth, lake, Marble Cathedral, marble caves, nature, Patagonia, phenomena, photos, pics, pictures, South America

In Patagonia, South America, General Carrera Lake is shared by Argentina and Chile. But on the Chilean side of the beautiful emerald-green to turquoise-blue waters, there are breathtakingly beautiful marble caves carved into passageways and caverns. These amazing marble formations were sculpted by erosion into three main marble formations: La Capilla (the Chapel), El Catedral (the Cathedral), and La Cueva (the Cave). The impressive labyrinth of marble caves are large enough for a small boat to glide into. Here are those magnificent marble caves. [35 Photos]