The cave beneath Predjama Castle in Slovenia is even more fascinating than the castle itself. And the storybook setting might spark a daring moment for travelers ready to conquer a fear of the dark.
www.slovenia.info/photo by Miha Krivic
Postojna Cave, Slovenia —
An electric train carries visitors on a two-mile route through Slovenia's Postojna Cave.
www.slovenia.info/photo by Miha Krivic
Machu Picchu, Peru —
For a traveler with a fear of heights, the Inca Trail to Machu Picchu serves up some dizzying vistas -- and drops.
Courtesy Boundless Journeys
Machu Picchu, Peru —
Built in the 15th century, Machu Picchu is a marvel of construction.
Cu Chi Tunnels, Vietnam —
For a frightening taste of extremely tight spaces, visit the historic Viet Cong tunnels at Cu Chi.
Getty Images/File
Canyon de Chelly National Monument, Arizona —
Spider Rock at Canyon de Chelly National Monument is a testament to the spider as a positive symbol in Native American cultures.
National Park Service
Mount Auburn Cemetery, Massachusetts —
There's nothing to fear at Mount Auburn Cemetery in Cambridge, Massachusetts, where the grounds are a horticultural showcase and the graves include those of Henry Wadsworth Longfellow, Winslow Homer, and Isabella Stewart Gardner.
