Duomo di Milano, in Milan, Italy, viewed from the Piazza del Duomo.
(Courtesy Jiuguang Wang/Wikimedia Commons)
An up-close view of the Duomo di Milano, from Piazza del Duomo.
(Courtesy Evan Blaser/Flickr)
A view from the top of Duomo di Milano, in Milan, Italy, overlooking the city.
(Courtesy Prayant/Flickr)
The Leifur Eirksson monument and the iconic Church of Hallgrímur, in Reykjavík.
(Courtesy Bernt Rostad/Flickr)
A close-up view of the architecture of the Church of Hallgrímur.
(Courtesy Tristian Ferne/Flickr)
A view of Reykjavík from the tower of the Church of Hallgrímur.
(Courtesy Andreas Tille/Wikimedia Commons)
The Borgund Stave Church, in western Norway, dates to 1180.
The interior of the stave church Borgund.
(Courtesy Micha L. Rieser/Flickr)
The roof of the stave church Borgund.
(Courtesy Micha L. Rieser/Flickr)
Las Lajas Sanctuary sits at the end of a bridge that stretches over a dramatic gorge, deep in the mountains of southwestern Colombia.
A closer look at Las Lajas, in rural Colombia.
Las Lajas looms over the rushing muddy waters of the Guaitara River, in Colombia.
La Sagrada Família, in Barcelona, Spain, is still under construction—an ongoing masterpiece.
(Courtesy Gavin Gilmore/Flickr)
A closer look at one of the façades of La Sagrada Família in Barcelona, Spain.
(Courtesy Bernard Gagnon/Wikimedia Commons)
A closer look at the details of La Sagrada Família in Barcelona, Spain.
(Courtesy bonniegme/myBudgetTravel)
The Saint Michel d'Aiguilhe Chapel, in rural France, sits atop a 269-foot-high volcanic peak.
(Courtesy Jean-Pol GRANDMONT/Wikimedia Commons)
The Saint Michel d'Aiguilhe Chapel, in rural France.
To reach the Saint Michel d'Aiguilhe Chapel, visitors must ascend 268 stone steps carved into the church's needle-like rocky mount.
The Church of Our Savior on Spilled Blood, in Saint Petersburg, Russia, is built on the site where Czar Alexander II was assassinated in 1881.
A close look at the onion-shaped domes of the Church of Our Savior on Spilled Blood, in Saint Petersburg, Russia.
(Courtesy tetrabrian/Flickr)
An evening view of the Church of Our Savior on Spilled Blood, in Saint Petersburg, Russia.
(Courtesy Andrew Bossi/Flickr)
You might recognize Ely Cathedral, in England, from several Hollywood films, including 2010's The King's Speech.
(Courtesy Terre/Wikimedia Commons)
The sanctuary of the Ely Cathedral.
(Courtesy John Salmon/Wikimedia Commons)
The east end of the Ely Cathedral.
(Courtesy John Salmon/Wikimedia Commons)
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