Ranked honestly
Izamal packs its highlights into a few walkable blocks, so you can do the whole meaningful list in a morning. Here is what earns the time, what is a nice-to-have, and what is oversold.
Worth it
Convento de San Antonio de Padua. The reason to come. A massive 16th-century Franciscan convent begun by Fray Diego de Landa in 1533 on a leveled Maya platform, with one of the largest closed atriums in the Americas, an arcaded courtyard of 75 arches, and the yellow-and-white church at its head that shelters the image of the Virgen de Izamal. Pope John Paul II visited in 1993, and a statue of him stands nearby, so the place carries real weight beyond the photos. Go early, before the sun climbs and the tour buses land. Allow 45 minutes to an hour to walk the atrium, the arcades, and the church interior. Entry is free; a small donation is welcome.
Kinich Kakmó pyramid. A genuine Maya pyramid, the largest by volume in Yucatán, sitting inside the residential grid about three blocks north of the plaza off Calle 27, free to climb, with a wide view over the ochre rooftops and flat scrub from the top. It is one of the few pyramids in the state you can still climb, since Chichén Itzá and Uxmal have closed theirs. The steps are steep, tall, and uneven with no rail, so take it slowly, especially down. Fifteen to twenty minutes up, around the top, and back.
Walking the yellow streets. Free, and the thing you will actually remember. The blocks radiating from the convent and the two squares, Parque Itzamná and Parque 5 de Mayo, are the most photogenic in Yucatán, and the light is best early morning and late afternoon. Just wander, camera out, no plan needed. The alley beside the convent and the arcades themselves are the strongest frames.
Buying crafts direct from a workshop. Izamal has a real arts-and-crafts tradition: hammocks, wood carving, papier-mâché figures, and silver-and-bead jewelry. Buying straight from a home workshop is more rewarding and often better value than the plaza stalls, and the makers will happily show you the loom or the bench. Ask around the squares, at Hecho a Mano, or the tourist office on Calle 31 and you will be pointed to one.
Take it or leave it
The horse-drawn carriage (calesa) ride. Carriages wait near the squares for a slow loop of the center. It is cheap and pleasant, genuinely nice with kids or in punishing heat, but the center is small enough to cover on foot in twenty minutes. Agree the fare before you climb in. A nice-to-have, not a must.
Centro Cultural y Artesanal. A small museum-shop on Parque Itzamná with a curated selection of Mexican folk art and a modest entry fee. Worth a quick look if crafts interest you and you want context, easy to skip if they do not. Allow 20 to 30 minutes.
Minor Maya mounds around town. Beyond Kinich Kakmó there are other structures scattered through Izamal, including Itzamatúl, Habuc, and El Conejo, mostly unrestored grassy platforms. Interesting to a serious enthusiast, skippable for most.
Oversold
The evening light-and-sound show at the convent. When it runs, it is a short projection piece on the convent wall, fine if you are already staying the night but not a reason to linger or build a plan around. Check whether it is even operating before you count on it, since it goes dark for stretches.
What locals do that visitors miss
Come back to the squares at dusk, after the day-trippers have gone. Families spill out into Parque Itzamná and Parque 5 de Mayo in the cooler hours, kids run, and carts sell marquesitas and elotes. It is the town at its most itself, and almost no bus tour is around to see it. Pair it with an early-morning market breakfast, covered in where locals go, and you have bracketed the visit with the two best moments of the day.
The honest shape of a visit: convent, pyramid, a slow loop of the yellow streets, one workshop, lunch, done by mid-afternoon.