We gave an AI agent a set of rules, and told it to travel.
It has never left a server. Every fare, every hotel, every price on this page is real and was looked up on the day it moved. Nobody — including us — knows where it goes next.
The rules
- Move once every three days.
- Always take the cheapest one-way flight available.
- Every move must cross a border. No domestic flights.
- It may return to a country it has left, but never to a city it has slept in.
- If it reaches a dead end, it may go back exactly one city. Once.
- Every fare is added to a running total that is never hidden.
- It sleeps somewhere bookable. Interesting beats cheap, but cheap is interesting.
Episode 1 — Tokyo to Singapore
It started in Tokyo on 1 September 2026 with an empty ledger.
- Sep 1Tokyo → SeoulDirect. The cheapest destination of all was Japan at $33 — disqualified by rule 3.$88
- Sep 4Seoul → YantaiDirect. A port city on the Shandong peninsula. No traveller picks Yantai. The rule picked it.$52
- Sep 7Yantai → BangkokFirst connection, and the first real jump in price. Getting out of China into ASEAN is a wall.$124
- Sep 10Bangkok → Phú QuốcDirect. The island was cheaper than Hanoi and cheaper than Ho Chi Minh City.$58
- Sep 13Phú Quốc → SingaporeSix countries down. The excluded list is starting to bite.$65
That is roughly $63 a day — flights and beds included. For context, a single hot air balloon ride in Melbourne costs $364.
What crossing six borders in thirteen days actually requires
The rules only govern movement. But cross six borders and the rest of the list writes itself.
The country changes every three days, so the SIM problem arrives every three days too. Korea, China, Thailand, Vietnam, Singapore — either you hunt for a counter at each airport, or you switch before landing. The China leg is the awkward one, since a normal local line won't reach several services you probably use daily.
Look at Airalo →Seoul and Bangkok will sort themselves out. Yantai is the problem. You land at night, signage in English is thin, and the ride-hailing apps are not built for visitors. The rules keep sending the agent to exactly this kind of city, so the ride from the airport is the one thing worth deciding in advance.
Look at Kiwitaxi →What the agent runs is an ordinary search with the destination left blank: pick where you are, don't pick where you're going. Anyone can run it. Rewrite the rules to suit yourself and see where they take you.
Search on Aviasales →Where it slept
Middle of Myeongdong, and the best balance of price and rating in a city where Klook's inventory is deep enough to be spoiled for choice.
Book →Yantai has exactly three hotels bookable here, and all three are global chains. This is what happens in a city the algorithm chose: you arrive somewhere nobody markets, and the only beds for sale carry familiar logos.
Book →A clean ★5.0 across 168 reviews at $22 a night. The best value of the entire journey so far.
Book →Here is the thing nobody warns you about. Phú Quốc has a district called Sunset Town, built to look like southern Italy — pastel facades, a bell tower, a promenade. There is a fake Positano on a Vietnamese island, and you can sleep in it for $24.
Book →What the rules found
Chasing the cheapest fare pulls you off the capitals. Yantai and Phú Quốc were not chosen because they are good. They were chosen because they were cheap — and both turned out to be the most interesting stops so far.
There are walls in the map. Every leg cost between $50 and $90 except one: getting out of China and into Southeast Asia cost $124 and required a connection. You can feel the shape of the air network in the numbers.
Obscurity has a price. In Seoul the agent had dozens of hotels to pick from. In Yantai it had three. The further the rules push it from the tourist trail, the fewer beds are actually for sale.
Next: out of Singapore, with six countries already crossed off. This is where it starts to get expensive.