Enter for the altar, then widen out
Best for first-time visitors: go straight to the Fangze Altar before the park paths distract you. The two-level square platform, red walls, and ordered courtyards explain why this corner of Dongcheng mattered to Ming and Qing emperors. Once you have that frame, the old trees and wider paths feel like a pause rather than a detour.
Choose the ticket mix before you drift
Choose the basic park ticket if you want atmosphere, a short heritage stop, and a low-cost north-Beijing break. Add the Huangqi Chamber / inner ceremonial area if you want the sacred focus of the complex, not just the outer mood. This is the one ticket decision that changes what you actually understand on site.
Let the next stop choose your gate
Treat event days as a different visit
During the Spring Festival temple fair or the September book fair, Ditan changes character. The same altar sits inside the park, but crowds, stages, food stalls, book stands, and temporary schedules take over the rhythm. Choose event days for local energy; choose ordinary weekdays when you want the square altar and old cypresses to do the talking.