Minecraft Vanilla, "Large Biomes" is off.
After filling the maximum zoom-out map of terrains surrounding the spawn, I took to the sea. I found some jungle connected to a taiga and a desert, then went further west. After two days by boat I found a tiny archipelago which I made into a pleasant place for resting. Another day of travel, and a rather small mushroom biome. A fresh map brought to maximum zoom-out, cruising it day and night, and then, when I filled it, I felt like I should start looking for a snark:
He had bought a large map representing the sea,
Without the least vestige of land:
And the crew were much pleased when they found it to be
A map they could all understand.
"What's the good of Mercator's North Poles and Equators,
Tropics, Zones, and Meridian Lines?"
So the Bellman would cry: and the crew would reply
"They are merely conventional signs!
"Other maps are such shapes, with their islands and capes!
But we've got our brave Captain to thank
(So the crew would protest) "that he's bought us the best—
A perfect and absolute blank!"
Well, not entirely. There are isles. Tiny ones. Maybe six, in area that takes two days by boat to cross, and quite much longer to cover.
I tried to travel quite a bit beyond the western edge of the map. Still no continent.
Can I expect to find some America if I travel further west, or does Minecraft sometimes spawn a biome that runs on indefinitely?