Metropolitan Cathedral

Mexico City's colossal cathedral, an architectural marvel, took nearly three centuries to complete, from 1573 to 1813. It stands on the ruins of an Aztec temple, using stones that echo the city's layered history. Stepping inside, you're greeted with a fascinating contrast: unadorned neoclassical walls meet exuberant, gilded chapels and altarpieces. The massive pipe organ, with its touch of baroque flair, occasionally fills the air with music, adding to the cathedral's majestic atmosphere.

Don't miss the high altar. It's worth splurging for a peek into the sacristy, with its shimmering dome, grand canvases, and enormous cabinets, seemingly designed to store an archbishop's entire collection of sacred tools. For a bit of a reality check, glance at the chandeliers. They seem to tilt, revealing just how much the city beneath is slowly sinking.

While you're there, take a moment to appreciate the cathedral's location in the heart of the city. The bustling Zócalo square outside offers a vibrant mix of history and modern life, with street vendors, performers, and locals going about their day. It's a place where the past and present coexist in a lively dance that defines Mexico City.