You want to get from Lisbon to Morocco. You assume you fly.
Type it into Rome2rio. Turns out there's a ferry. Takes about 35 minutes across the Strait of Gibraltar. Costs almost nothing. You didn't know that was an option because you've been booking flights your whole life and never thought to ask.
That's what Rome2rio does. You type any two places on earth — cities, towns, airports, train stations, landmarks, addresses — and it shows you every single way to get between them. Every mode of transport. Every combination. With real estimated prices, real travel times, and links to book.
The routes it finds are the ones you'd never think of. The overnight train that's cheaper than a flight and saves you a hotel night. The ferry that cuts through a border crossing you didn't know existed. The bus that goes direct when everyone told you there was no direct option. Rome2rio has indexed hundreds of thousands of routes across every transport network on earth and it surfaces all of them at once.
It works for the obvious trips and the insane ones. New York to Los Angeles — sure, you know you fly, but it'll also show you the train (3 days, weirdly appealing), the bus (don't), and the drive (38 hours, it's your life). London to Tokyo — here are four routing options through different hubs with price comparisons. Your hometown to a national park two states over — here's the bus you didn't know existed.
It's not a booking engine. It's a discovery engine. It shows you what's possible and then hands you off to book wherever makes sense.
Before you assume you have to fly somewhere, check Rome2rio.
There might be a ferry.