About Marco Três
Marco Três is the useful-information system of the Triple Frontier — Foz do Iguaçu (BR), Ciudad del Este (PY) and Puerto Iguazú (AR). More than a portal: live data, tools and verified guides that help visitors and residents decide with data, not guesswork.
What Marco Três does
Live data
Exchange rates for all three countries, weather and forecast movement at the attractions — updated throughout the day.
Tools
An AI concierge, a queue-free itinerary, the allowance calculator, a document checker, emergency numbers and the bridge queue live.
Verified guides
Practical answers to the questions people ask before traveling — each with an official source.
Open AI newsroom
An automated, transparent newsroom that publishes only good news from the region, always citing the source.
How it works — and why trust it
Curation is automated by artificial intelligence, with full transparency and one non-negotiable principle: zero inference. If a piece of information isn't in the verified source, it doesn't go in. All content cites and links its origin, and live data comes from public, official sources.
Editorial oversight is by Annie Grellmann — born in Foz do Iguaçu, a journalist — responsible for the editorial line, periodic checks and the correction or removal of any inaccurate content.
Commitments
- Zero inference: if it isn't in the source, it isn't here;
- Credit and a link to the official source in every data point and guide;
- Fast correction: inaccurate content is fixed or removed;
- Live data from public sources; tools are labeled as estimates when they are forecasts;
- Accessible: three languages (PT/ES/EN), readable by AI and screen readers.
Contact: 3xmarcotres@gmail.com · Maintained by INFI Comunicação.
Marco Três is an independent media outlet. The name and symbol refer to the geographic meeting of the three borders; we have no connection to the Three Frontiers Landmark attraction or its operator.