This 13th century Gothic brick castle is the largest in the world by surface area.

Modern art commemorates one of the first military actions of World War II.

This Communist-era residential block is one of the longest residential building in Europe.

The site of the first battle of World War II.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

This fairytale inspired, warped building houses restaurants, shops, and a radio station.

An ode to a soldier who came to town, fell in love, then began making his own sparkling wine.

A sculpture of a beloved local figure, who tipped his top hat to everyone he passed on the streets of Bratislava.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

A favorite with sightseers, this Norwegian funicular provides easy access to a stunning view of Bergen and its environs.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

On this Polish road, an optical illusion makes cars seem to roll uphill.

This fairytale medieval church in Poland originally spent centuries in Norway.

A stunning architectural yet functional feat, towering over Oslo.

A living museum working to keep the traditions of building and repairing handmade wooden boats, ropemaking, and blacksmithing alive.

The former home of Norway's greatest romantic composer.

Ruins of two abandoned stations destroyed by the power they sought to harness.

This functioning parish church is also the site of many concert performances due to its wonderful acoustics.

Norway's national monument to fallen seamen.

In downtown Oslo, a menacing and terrifying relief clings to a church wall.

World's strongest whirlpool.

Thousands of years of crashing waves gave this mushroom-shaped rock its svelte figure.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

Housing the famous Norwegian ice-defying 19th century polar exploration ship.