This vast masterpiece of Moroccan architecture spreads across 20 acres.

Deliberately hidden for centuries, the magnificent Saadian Tombs were eventually uncovered in 1917.

The largest madrasa in Morocco once housed more than 900 students within its exquisite walls.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

A centuries-old church stands as a testament to Boston's "father of architecture."

The location of one of the first private Catholic schools in the country, providing a valuable sanctuary during the tumultuous period when Protestant and Catholic students were at odds.

A small collection of iguana-infested ruins hides amid Cancún's bustling hotel zone.

Designed to honor all those that work as nurses around the globe.

Dedicated to nine marines from Massachusetts who perished during the Beirut bombings.

A beacon atop a downtown building provides Bostonians with weather forecasts and baseball news.

This memorial honors those who served on Gallops Island Radio Training Station during the second World War.

The final resting place of the first documented Chinese person in the United States lies in a Boston cemetery.

A school used as a model for public education across the country.

This statue intended for children to enjoy became a minor political spat.

These items are all that remain from the room used by the author during his second tour of the U.S.

In the 19th century, this was the center of Boston's Black community.

The last remaining 19th-century tenement from Boston's old West End neighborhood.

This historic Boston building has gone from personal estate to porn theater and back again.

Around 160 years ago, this spot marked the location of a wharf along the shores of the Charles River.

This headstone marks the grave of an 11-year-old boy killed during clashes in the streets over the boycotting of British goods.

Stolen goods adorn the organ at Old North Church.

A tiny plaque marks the location of the water source that facilitated the birth of modern-day Boston.

The infamous Boston Mob ran rackets from an office here in the 1970s.