An extravagant 18th-century fountain built with bits of broken ceramic.

This colossal ancient sculpture of the monstrous Aztec rain god has a literally stormy history.

The Mexican painter Diego Rivera created this unusual museum to display his collection of pre-Hispanic artifacts.

These biodiverse university gardens form a green oasis amid the urban chaos of Mexico City.

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

A museum in the former home of Marxist revolutionary Leon Trotsky.

Meant to be one of the most extravagant hotels in the world, now an eerie, abandoned architectural gem in Mexico City.

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

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

Part bookstore, part café, and part forest.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

With statues of Nelson Mandela and Harvey Milk this monument has been called the Mount Rushmore of California.

A storybook European village in Berkeley.

Oakland's beautiful monumental cemetery.

Nose around a unique collection of more than 300 natural aromas used to craft perfume fragrances.

A shape-shifting buy-sell-trade bookstore, born to Beatnik Era spirit.

Travelers exchange letters with woodland creatures at this mini post office.

Spiral labyrinth hidden in the hills above Oakland, CA.

A monument to the love people have for their pets.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

A winding path built in secret on the edge of the continent.

Internationally-recognized arts center housed in a century-old former military barracks.

An abandoned, unfinished mansion on grounds strewn with lava rocks.

Concrete strongholds stand guard over the Golden Gate.