Alternate History "Bridges" are formed between all the continents & subcontinents of the world, a year after the death of Jesus Christ

[CarlManvers2019]

These "Bridges" somehow don't cause any earthquakes or tidal waves, they are invulnerable to any attempts at destroying them and people can walk the entire way there even as a storm is brewing, provided they have the resources and they can keep their feet grounded

Said "bridges" include geographical data as to where they are headed, which even illiterate societies can understand