One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

A 16th-century Andalusian palace.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

Formerly known as National D-Day Museum, this collection commemorates the battles of Normandy and WWII.

This bar named after the world's first mixed cocktail was home to one of New Orleans' most notorious politicians.

The video game-themed street art first popped up in the French city.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

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

This skeleton-filled altar piece served as a backdrop to one of the most iconic scenes in "The Sound of Music."

A centuries old castle atop a dormant volcano houses museums devoted to both women and witches.

Baroque celebration of the end of the Great Plague of Vienna.

"Mock all and sundry things, but leave the saints alone."

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Dim sum, served in a grand old theater.

Two thousand artifacts from around the world collected by one woman who loved to travel.

Despite the name, this 16th-century structure in Galway wasn't built by the Spanish.

The ruins of a sixth-century monastery sit on the banks of the River Shannon.

The ruins of a monastery that dates to the 7th century.

Some of the saint's blood and bones are said to reside in Dublin.

The modern birthplace of Irish freedom.

The ancient tomb acts as a calendar that keeps perfect time.

This historical Netherlands fortress still bears the marks of its single siege.