Bigger harbour. Green to enter, Blue Keycard as the puzzle reward, oil refinery on the pier.
Entry-level puzzle monuments. A single green keycard and one fuse opens the loot room. Low or no scientist presence, low radiation, and component / mid-tier loot perfect for early wipe.
| Keycards | 1× Green (puzzle uses Green; reward is a Blue Keycard) |
|---|---|
| Fuses required | 1 |
| Scientists / NPCs | 0 (when Cargo Ship not docked) |
| Radiation | None |
| Recycler | Yes (×1) |
| Workbench | None |
| Oil refinery | Yes (Small Oil Refinery between Pier 2 & 3, pre-loaded with 100 wood on fresh wipe) |
Large Harbor is the bigger of the two harbour variants — a sprawling industrial port with a green-card puzzle, a recycler, a public oil refinery, and roughly double the crate density of Small Harbor. The puzzle uses a green keycard and rewards a Blue Keycard. No scientists or radiation when the Cargo Ship isn't docked. One of the most-contested wipe-day monuments because of the loot density and coastal visibility.
Large Harbor's puzzle structure is similar to Small Harbor but with a larger surrounding area to clear:
The trade-off: Large Harbor takes longer to clear and is more contested mid-wipe.
A single green keycard plus one electrical fuse — same Tier 1 puzzle structure as Small Harbor. The puzzle reward is a Blue Keycard.
About 5-8 minutes for a thorough sweep — puzzle plus crates plus recycler. Solo runs faster; duos and trios can split the sweep for faster clears.
No — Large Harbor has no NPC defenders when the Cargo Ship event isn't docked. Same as Small Harbor.
The puzzle room contains the Blue Keycard plus military and component crates. Spawn rates can vary by patch but the primary reward is the keycard itself, not an elite crate.
No — each puzzle consumes one green keycard. Bring two cards if you plan to run both in a single wipe-day route.
Large Harbor is the single highest-loot green-card monument in Rust by total crate count. The puzzle reward is a Blue Keycard (same as Small Harbor), but the surrounding crate density nearly doubles the total components and scrap. For solos with limited green keycards, picking Large Harbor over Small Harbor is the right call when both spawn on the map — same card cost, significantly more loot.
The trade-off is contention. Large Harbor's coastal visibility makes it a wipe-day magnet, and well-organised duos and trios will run it within the first 30 minutes of force wipe. Solo players doing a Large Harbor run after the first hour should expect heavier traffic and plan defensively.
For groups, Large Harbor's spread-out layout and bigger boat dock make it a natural staging area. A trio can split into puzzle, sweep, and watchtower roles, clearing the entire monument in 4-5 minutes. The crane apex is the natural watchtower position — sightlines covering most approach roads.
For full route planning across all green-card monuments, see the Monuments hub. For raid math on the loot you'll bring back, the Raid Calculator covers explosive cost vs target HP.