I've been building Geonauts Guide - an AI-powered travel companion that makes exploring the world's landmarks more engaging. It has 126 iconic locations (mix of man-made wonders like the Taj Mahal and natural wonders like Zhangjiajie) with AI-generated audio narrations for each one. The narrations are 2-3 minutes long and the AI adds witty observations that connect historical facts to modern life, like "The Great Wall took 2,000 years to build - your 2-year project doesn't seem so bad now!" There's also an AI route planner that helps with multi-city trip planning and gives conversational travel advice. The daily geography challenge is probably the most addictive feature - every day you get clues about a mystery city and try to guess it. It's like Wordle but for geography nerds.

The biggest challenge was getting the AI's tone right - informative but not boring, witty but not forced. Would love feedback, especially on mobile UX and the daily challenge game! Try it here: https://geonautsguide.com