Rhône Glacier ice grotto in Valais, Switzerland (© CEM/Getty)

【January 30 2015】For more than 140 years, the Swiss have maintained a tunnel carved into the Rhône Glacier in Valais, Switzerland, which allows visitors to walk underneath the ice. The blue grotto allows a unique perspective on the massive Alpine glacier that feeds the river Rhône and Lake Geneva.Explore breathtaking Gallery from the HuluTrip homepage over the past 5 years..