These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

This cemetery features modernist statues as strange as its name.

A beautiful but toxic fountain of mercury.

This semi-secret storybook hedge maze is also the oldest garden in the city.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

The plants form a living library and laboratory for researchers and students at Michigan State University.

Hell on Earth is actually a small town in Michigan where anyone can be mayor for a day.

Advice-columnist's bell tower, paid for with pennies.

This railway-turned-greenway provides a pedestrian link in downtown Detroit and celebrates urban artwork.

To truly appreciate Detroit's landmark skyscraper, you have to step inside.

38-story baroque tower reflecting Detroit's rise, fall, and possible rise again.

Detroit’s downtown castle is one of the oldest structures in the city.

An ever-evolving wall of graffiti art off East Liberty Street.

A Beaux-Arts triumph set to become Ford's innovation campus

Berry Gordy Jr.'s old home was the original headquarters of Motown Record Corporation.

Where the Model T was made and the assembly line was invented.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

One of the few working locomotive roundhouses in the United States.

Inside the Wayne County airport is an amazing collection of lights and sounds.

The city is full of whimsical portals to another world.

This quaint stretch of road is the final resting place for hundreds of America's four-legged veterans.

These gardens recreate unique and endangered Michigan habitats.