Resting place of Hollywood's immortals is also site of summer film screenings.

America's most famous piece of self-built architecture.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

The legendary building that needed ghostly approval before being built.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Its collection includes a broad array of social, geographic, graphic design, and political history.

The first geometric self-supporting spiral stairs in Britain are a truly beautiful sight.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

A statue in Balderas subway station honors the rock star who wrote about it in a song.

This mid-century mural portrays humankind's spiritual and scientific journey.

A tribute to the 20th-century ball that cast a spotlight on Mexico’s LGBTQ community.

The former headquarters of Mexico's Secretariat of Public Education now houses a muralism museum, including Diego Rivera's first large-scale mural project.

The unique collection often goes unnoticed by visitors focused only on the archaeological objects.

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

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

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

Frida Kahlo's childhood home, now a museum of her life and works.

Diego Rivera's massive tiled fountain and failed infrastructure project.

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

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

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

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