Hollow Road
Underground Atlas & Depth Log
Free · Designed for iPad. Not verified for macOS.
Hollow Road is your companion for discovering and learning about the world below — caves, catacombs, castle vaults, mines, and tunnels.
Whether you are planning a visit, studying geology and history, or logging a real descent, Hollow Road brings maps, articles, checklists, and focus tools into one calm underground-themed experience.
ATLAS
• Explore dozens of underground sites on an interactive world map
• Filter by type: caves, catacombs, castles, mines, and tunnels
• Bookmark favorite locations and plan a logical route
• Read site summaries with historical context
• Optional location access helps you find the nearest site on the map
• Wikipedia summaries load when a network connection is available
DEPTH LOG
• Record expeditions with depth, duration, team size, and field notes
• Track mood, temperature, and conditions
• Visualize your descents and review personal statistics
• Export expedition summaries to share with your team
CHRONICLE
• Read curated offline articles on cave geology, medieval vaults, catacomb history, exploration safety, folklore, and architecture
• Built-in glossary with tappable terms
• Bookmark articles and resume reading where you left off
• Quick Check quizzes to reinforce what you learned
GEAR VAULT
• Pack from ready-made gear templates for caving, catacombs, castles, mines, and night exploration
• Mark required items and track readiness before you go
• Link a kit to an upcoming expedition
TORCH
• Start timed focus sessions for map study, reading, or expedition planning
• Live Activity on the Lock Screen and Dynamic Island during active sessions
• Track focus streaks and weekly session history
WIDGETS
• Home Screen widgets for torch streak, latest descent, and weekly focus rhythm
Hollow Road is designed for education and personal journaling. It does not provide professional safety certification, guided access, or emergency services. Always follow local laws, permits, and expert guidance before entering any underground site.
No account required. Your logs and progress are stored on your device.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Improved reading and bookmarks in Chronicle
The developer, Ferme l'Erable Vert Inc, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Ferme l'Erable Vert Inc
- Size
- 8.8 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Chantale Vezina