1. A form of treasure hunt using the Global Positioning System to locate the cache

Encyclopedia: Geocaching

• Horatio Alger
• Horatio Herbert Kitchener
• Horatio Hornblower
• Horatio Nelson
• Horatio Walpole
• horde
• hordeolum
• Hordeum
• Hordeum jubatum
• Hordeum murinum
• Hordeum pusillum
• Hordeum vulgare
• horehound
• horizon
• horizontal
• horizontal bar
• horizontal combination
• horizontal integration
• horizontal parallax
• horizontal section
• horizontal stabiliser
• horizontal stabilizer
• horizontal surface
• horizontal tail
• horizontality