A bare tree in Riga’s Esplanāde is transformed into an extraordinary vertical neighbourhood by scores of colourful bird nesting boxes clustered across its trunk and branches.

A quiet grave marks the site of a centuries-old fairytale love story that turned out to be a real murder.

A map store filled with original Cold War era Russian maps of the world.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

The gnarled remains of an exploded German bunker from World War II sit along a breathtaking fjord.

Every summer, an open-air swimming pool appears at the base of a Finnish city's beloved winter attraction.

A historic scientific breakthrough that crosses nine borders.

This Estonian watchtower looks like a big tree with two giant bird nests on it, complete with a "golden egg."

During the Soviet era, the spire of this longstanding church was used as a radio transmission tower.

Walk along the medieval fortifications that have been protecting Tallinn since the 14th century.

These enormous, stern-faced statues greet visitors with lanterns, and sometimes costumes.

At the very tippity-top of Europe is a cliff from which you can view the midnight sun.

World's strongest whirlpool.

This roadside attraction looks like a flying saucer parked atop the tundra.

A stoic sculpture that overlooks the waters.

The world's first and only escalator for lazy bicycles and their daunted riders.

A museum dedicated to Norwegian music, old and new alike.

Believed to be the country's tallest waterfall, the Njupeskär is actually much smaller.

The unique design of this former quarry provides ideal acoustics for concerts.

An oil drilling mistake created this fountain that has been spraying water for over 150 years.

A centuries-old copper mine that once provided two thirds of the world's copper supply.

The world's biggest version of the popular Swedish souvenir.

A tiny town hall—in Sweden's one-time capital—might be the smallest in Europe.