A subterranean house of worship carved right out of the bedrock.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

An abstract monument to a symphonic composer.

An alien church provides much needed silence in the midst of a Finland shopping center.

A swaggering, monumental souvenir of the most extravagant party Montreal’s ever thrown.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

The resilient spirit of this remote mining town burns bright in its eclectic memorabilia.

This hidden park hosts a rogue’s gallery of eccentric architectural obelisks.

This mesmerizing kinetic sculpture blossoms endlessly in the breeze.

The vaulted ceiling is home to a scurry of “squirrelgoyles.”

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

This haunting sculpture was created as a statement on the mechanized warfare of the First World War.

An enigmatic monument to the Irish revolutionary who plotted an uprising against British rule.

The pockmarks across the building's facade are remnants of the Blitz.

The chaotic studio of one of the 20th century's most important artists has been preserved down to the dust.

Every year, the colorful murals of Montreal get a complete makeover.

A Montreal deli that was so beloved that it was allowed to circumvent their laws of language.

This engineering marvel is the longest bridge in Canada and one of the longest spans in the world.

A mysterious shape catches the eye in this 16th-century painting.

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

Revel in the Victorian splendor of the world's oldest eating establishment inside a museum.

The first transatlantic wireless signal was received at this 17th-century fort.

Students can borrow artwork from this gallery to display in their own residences.

A monument to the thousands of Canadian soldiers who died capturing the French ridge during World War I.