Courtesy of Hammacher Schlemmer

Metal-Detecting Sandals

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Ever wonder what lies just below the surface at the beach? Tin cans, discarded razor wire, or—better yet—buried pirate treasure? Hammacher Schlemmer’s smart sandals use “beat frequency oscillation technology” to signal when a metallic object is underfoot. The downside: they detect a mere two feet underground—and you have to strap the battery pack to your calf (good luck explaining that tan line at the hotel pool). Ebay.com; $59.95.

—Kathryn O’Shea-Evans

World's Weirdest Travel Gadgets

Metal-Detecting Sandals

Ever wonder what lies just below the surface at the beach? Tin cans, discarded razor wire, or—better yet—buried pirate treasure? Hammacher Schlemmer’s smart sandals use “beat frequency oscillation technology” to signal when a metallic object is underfoot. The downside: they detect a mere two feet underground—and you have to strap the battery pack to your calf (good luck explaining that tan line at the hotel pool). Ebay.com; $59.95.

—Kathryn O’Shea-Evans

Courtesy of Hammacher Schlemmer

World's Weirdest Travel Gadgets

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