13 Creepy Underground Attractions

These man-made attractions, scattered around the globe, boast spectacular histories as former dwellings, burial grounds, and even smugglers’ tunnels.

World’s 10 Most Awe-Inspiring Caves

The natural world can be pretty spectacular, but what we see every day isn’t even the half of it. Deep beneath the earth’s surface, hidden away in mountains, or submerged within oceans are some of the world’s most awe-inspiring natural wonders.