Some six kilometers (four miles) outside of the center of town, a cartographer's concept is given a physical expression at Macapá's most visited attraction. This monument marking where the equator passes through the city consists of a 30-meter-tall (98-foot-tall) tower with a large open circle at its top. Twice a year, at the spring and fall equinoxes, the sun aligns with that circle, focusing a line of sunlight along the equator. The raucous music you may hear in the soccer stadium next to the monument may be from one of the samba competitions held there regularly. If you are traveling out to the monument for a quick photo op, we suggest asking your cab to wait for you.