Get in line for Lisbon’s most famous sandwich.

Step back in time at this 19th-century kiosk.

These abundant, over-the-top monuments are so widely scattered that they define the entire compact capital cityscape, often leading to jokes about whether there are more statues than residents.

A monument commemorating the 852 lives lost in the sinking of the MS Estonia.

The mirrored section takes the shape of Hebrew characters when viewed from above.

This fortress-like monastery is covered with intricate frescoes.

Hundreds of signs pointing to the birthplaces of current Helsinki residents form stalactites on the ceiling of the cave-like Kamppi metro station.

A former smithy turned cultural hub with the capital's largest mural space.

An abandoned pasta factory in the centre of Bucharest, once home to Bulgarian revolutionaries and a hub of crime.

A prime example of socialist modernist architecture, wrapped in a enormous fresco about the media.

One of Serbia's oldest luxury hotels and a nostalgic echo to Yugoslavia in the state's former capital.

Switzerland's oldest public observatory is an important part of the Zurich cityscape.

A neglected spomenik overlooking the beautiful Kopaonik Mountains.

An unfinished Serbian Orthodox church with 1,389 golden crosses planned to represent the Battle of Kosovo.

An underground world of gorgeous, palatial metro stations designed as a nuclear shelter complex.

This memorial to a murdered empress took 20 years to design, then spent 30 years hidden away in storage.

A Soviet era flat that refused to conform to the dull gray standards.

A mechanical clock built in 1914, with a rotation of 12 historical figures on its face.

Dedicated to the outnumbered Finnish forces who pushed back Soviet forces during the conflict.

Memorial to the victims of the Holocaust in Serbia.

These 400-year-old ruins are all that's left of the monastery where Ines de Castro was assassinated by the King of Portugal.

This metro station doubles as an unintentional paleontology museum.

Also known as Uncle Karl, the beloved bronze copper keeps a watchful eye on St. Stephen’s Basilica while people rub his lucky belly.

Krakow's own version of the Hollywood Walk of Fame.