The grotto where Saint Ignatius of Loyola lived as a hermit for nearly a year.

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.

An early 20th-century bullring converted into a modern shopping center.

This colorful statue welcomes visitors to a Barcelona park.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

This influential Renaissance-era library was once the haunt of kings and monks.

Belfast's namesake river still winds below the city center, hidden from sight.

A giant sculpture of the legendary "Salmon of Knowledge" celebrates the return of fish to Belfast's River Lagan.

This massive monument has been telling the time for 150 years—at a slight angle.

The only monument to name all of the passengers and crew who died on the RMS Titanic.

The statue honors a beloved bird that once roamed St. George's Market.

The last Victorian market in Belfast.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Designed by Gustave Eiffel before his famed tower.

The Gaudí-inspired building that was the start of Terrassenc modernism.

A museum-like shop that has been producing clogs, brushes, and ropes for nearly 200 years.

Centuries ago, red and white wine poured from the statue's breasts whenever a new Venetian ruler was elected.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

This Renaissance palace features a unique architectural design and is now home to the Ferrara National Art Gallery.