This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

A popular place to pick up prehistoric coral fossils from the time when Michigan was an ocean.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

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

A beautiful but toxic fountain of mercury.

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 iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

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

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

What was once the largest NFL stadium.

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

The only surviving prototype for Buckminster Fuller's house of the future.

The world's oldest operating jazz club has been in operation since May 1934.

Standing guard on top of an old, vacant ice cream shop.

Concrete igloos standing across from what remains of the Michigan Central train depot.

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

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

Collective made up of artists, musicians, and activists.

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

The world’s largest Masonic temple was saved by the White Stripes.

Detroit housing collective working to create an "environment for revolutionary change."

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