One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.

Turntable anonymously received orphans, alms, and groceries.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

This cemetery features modernist statues as strange as its name.

An early 20th-century bullring converted into a modern shopping center.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.

The grandiose interior of this bar speaks to its past as home to famous jewelers and railway offices.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

The concrete shell of an industry giant remains as a playground for graffiti artists, auto scrappers, and paintball warriors.

This empty Detroit high school was too expensive to maintain or destroy.

Enormous small-business mecca in the Midwest, serving dozens of artists.

These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

The bones of an old zoo crumbling in the shadow of a new one.

This sprawling bookstore spans four floors and has more than a million books in stock.

Museum dedicated to the terror regimes of Hungary.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A vintage video game wonderland in downtown Reykjavik.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.