An inconspicuous footbridge beloved by San Diego locals.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

This replica of the Greek structure is in the heart of Nashville.

The Grand Canyon of Texas.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

Activists are fighting to preserve these unfinished highway ramps as a tribute to the citizen revolt that halted their construction decades ago.

A beautiful final resting place for some of the noteworthy deceased.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

This working class sculpture pounds his hammer all the livelong day.

The first park built over a freeway is a brutalist masterwork.

Hotel designed around a 16th century Mexican bullring.

Inside this mountain lies several kilometers of breathtaking caves.

Two waterfalls flow down the cliff faces decorated with rare natural basalt columns.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

The winter home of millions of migrating monarch butterflies.

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

This giant expressionist head crowns a museum devoted to a beloved Mexican leader.

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

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

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

Part bookstore, part café, and part forest.

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