The winter home of millions of migrating monarch butterflies.

High atop a Mexican rainforest mountain, this ancient pyramid once drew pilgrims countries away.

Mexico's first public cable car soars over the congested streets outside Mexico City.

This incredible college library is a visual masterpiece of mosaic art. It also looks kind of like a giant boombox.

66,000 pieces of art, donated by one of the world's richest men.

Part bookstore, part café, and part forest.

The only castle in North America to ever house European sovereigns.

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

A colorful "forest" made entirely from three tons of recycled plastic waste.

This "City of Books" holds a museum, library, and the complete personal book collections of five of Mexico's greatest thinkers.

A curious museum of old video game consoles hidden in the back of a store.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

Where layer cakes tower above one’s head and there is never a shortage of icing.

These spectacular, symbolic serpents lie within the shadow of the Great Temple.