Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

The world's first invisible city square is an homage to a man who pushed the boundaries of art.

Rub it for a bit of good luck.

A 15-foot-tall statue of the head of the Sopranos family greets passengers at a train station in southeastern Lithuania.

Plaques celebrating Lithuanian writers freckle a wall of this picture-perfect path.

A 300-kilogram egg sculpture that embodied a neighborhood revival.

This magnificent Art Deco church is a reflection of Lithuania’s turbulent history.

A century-old prison in the heart of Vilnius is now a lively bar, dance club, and artist residency.

This former KGB building is now a museum memorializing the people who suffered during the Soviet regime.

Over time, this castle grew to encompass the entire island.

An abandoned masterpiece of Soviet Brutalist architecture.

Travelers who fall victim to this mermaid's charms are destined to stay in Užupis forever.

This micro-nation may be some sort of prank, but its constitution sure seems official.

Legend has it that Napoleon Bonaparte fell in love with this Gothic church.

Ever-growing collection of devils in art.

A memorial to the murdered Jews of Kaunas.

These enlarged egg sculptures represent the native birds of eastern Iceland.

The foundation of this ancient stupa dates back to the 1st-century.

A monument to the grand synagogue that stood in this space before Nazis burned it down.

The holes in this wall provide a glimpse into Jewish life in Budapest, both past and present.

The metal leaves on this tree are engraved with the names of Holocaust victims.

Time stands still at this serene burial ground in the center of Budapest.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.