Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

The mayor made the declaration in 2004.

This historic graveyard was partially paved over to create a streetcar line.

San Diego's most historic and haunted home.

It would be a crime to miss it.

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

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

The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

An indigenous take on European design creates a stunning visual overload.

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

This hotel is an amazing example of the Escuela Tapatía de Arquitectura movement.

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

An island filled with hundreds of hanging, decomposing, decapitated dolls.

The ruins of a former sanctuary for elite Aztec warriors.

These colonial murals are a fascinating hybrid of Spanish and Indigenous aesthetics.