Welcome to Macapá
The state capital of Amapá lies on the equator, in a strategic position on the north side of the Rio Amazonas estuary. It's not really worth a trip on its own and as such is well off the well-trodden traveler routes. But anyone headed to French Guiana must pass though Macapá and won’t regret spending a day or two here, with its cooling river breezes (especially along Rua Beira Rio), a couple of nice sights and festivals celebrating Afro-Brazilian culture. If you have extra time, visiting the San Antônio waterfall or forging a path to the national parks can be rewarding (though tough) before you head up to the border.
Downtown Macapá is a reasonably walkable place, though the fierce heat and general lack of shade can make for sweaty exploring. Consider taking a cab or moto-taxi.