The oldest housing complex in Riga is a mini timeline of architectural trends.

This dizzying tower was built to better broadcast the 1980 Moscow Olympics.

Relics from an era long gone, sit idle outside this Estonian museum.

This striking memorial is one of Estonia’s most controversial Soviet leftovers.

A former imperial sea-fortress and Soviet prison.

Estonia's largest creative city is a vibrant bohemian hub located within a former industrial complex.

Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

This former medieval prison now unlocks Estonia’s rich photographic history.

A statue of the second-tallest Dutchman in history.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

This 11th-century castle sits so low you can't see it behind the surrounding buildings.

This gigantic monument hidden in the woods was built to thank the Dutch for sheltering Belgian refugees during World War I.

An art installation memorializing a tram stop, which became a tram stop.

A nearly 25-foot concrete sculpture of Sylvette, Picasso's muse.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

This old KLM airplane cut into three parts was transformed into an eclectic airport gift shop.

Building Men of War and Indiamen from Holland's Golden Age.

This towering church is home to a world-famous organ and a treasure trove of medieval art.

This medieval castle was painted pink as part of a now-abandoned children's theme park.

The works of poetry's biggest names grace the walls of the city of Leiden, all carefully painted by hand.

This large sand dune in the Netherlands is home to wind-whipped trees with "floating" roots.

Europe's official "zero-level," the equator of elevation.