An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

Paris' linguistic guide to the international language of, yes, love.

This collection of promotional calendars preserves a staple of mid-century Mexican pop art.

This simple rock stands as a memorial of the major student protests of 1968.

This striking building appears to defy gravity, a tower balancing atop a much smaller cube.

A unique hybrid of fountain, stained glass and monument, designed and built by a notable architect-engineer team.

Named after a Mexican president, who once lived nearby, this park in a residential Mexico City neighborhood packs a whole lot of history into a small space.

Mexico's second-tallest monument, now half-hidden in a private residential complex.

The outside of this theater is decorated with a Diego Rivera mural that explores the history of Mexico.

The extremely grey columns of one of Mexico City's most iconic beltways are slowly gaining a bit of color.

This immense scene of a cosmic battle between a jaguar and serpent illustrates the Aztec concept of the duality of life.

Resembling a 15th century medieval fortress, this home once belonged to a legend of Mexican cinema.

The collection of intricate sculptures includes one carved from a mammoth's tusk

In 2008, this Mexico City metro station was the site of an hours-long fight between emo, punk, and goth groups.

Some charming, but sadly, unloved animal statues call this park home.

This hotel is an amazing example of the Escuela Tapatía de Arquitectura movement.

It's believed this golden brick is part of the legendary lost Aztec treasure.

The turquoise-studded skull of a long-dead Aztec man sits within Mexico City’s Museum of Anthropology.

This colossal ancient jaguar sculpture was used as a vessel for the hearts torn from sacrificial victims.

This industrial Art Nouveau gem is a historic hotspot for Mexican counterculture.

In Coyoacán, a pair of coyotes crown a public fountain in reference to the ancient Aztec name of the borough.

A fabulously bizarre surrealist sculpture by the late artist Leonora Carrington.

Come face to face with the ferocious visage of the serpent-headed mother goddess of the Aztecs.

The underground mall's skylights look like they could be part of a spaceship.