import folium


lon = -(41 + 20 / 60.0 + 17 / 60 / 60.0)
lat = -(20 + 59 / 60.0 + 35 / 60 / 60.0)

min_lon, max_lon = -45, -35
min_lat, max_lat = -25, -15

m = folium.Map(
    max_bounds=True,
    location=[lat, lon],
    zoom_start=6,
    min_lat=min_lat,
    max_lat=max_lat,
    min_lon=min_lon,
    max_lon=max_lon,
)


kw = {
    "radius": 10,
    "color": "black",
    "fill": True,
    "weight": 1,
    "fill_color": "green",
    "fill_opacity": 1,
}

c0 = folium.CircleMarker(location=[max_lat, min_lon], tooltip="Upper Left Corner", **kw)
c1 = folium.CircleMarker(location=[min_lat, min_lon], tooltip="Lower Left Corner", **kw)
c2 = folium.CircleMarker(
    location=[min_lat, max_lon], tooltip="Lower Right Corner", **kw
)
c3 = folium.CircleMarker(
    location=[max_lat, max_lon], tooltip="Upper Right Corner", **kw
)

for c in [c0, c1, c2, c3]:
    m.add_child(c)

m