Questo

Questo provides self-guided, interactive walking tours in over 1,000 cities worldwide. These tours are designed as real-world quests, combining elements of puzzles, storytelling, and exploration to help users discover new places and learn about their surroundings.

Questo offers real-world quests that are essentially themed walking tours blending puzzles, storytelling, and exploration in various cities. Users select from different quests (themed campaigns) and complete challenges tied to specific locations, which aligns with 'themed-campaign-selection' and 'location-based-quests'. The website also mentions navigating quest locations, implying interactive map navigation. While it mentions solving puzzles and riddles, it doesn't explicitly detail a leaderboard or rewards system beyond the experience itself, nor does it specifically mention photo, wildlife, or environmental challenges.