A former Latvian headquarters of the brutal KGB secret police is now open as a grim reminder of their atrocities.

This abandoned secret city is a crumbling wonderland of Soviet ruins.

A former imperial sea-fortress and Soviet prison.

This old and disused water tower has received a new life as an art gallery with a piano staircase.

Legend has it that not even Stalin could pull down the 2015 European Tree of the Year.

Two old windmills got a new life as oversized sculptures of a man and a woman.

A wooden statue of an Estonian pagan god and King of the Setos stands atop a sacred hill.

Hundreds of unusual wheel crosses poke above the earth in this small Estonian cemetery.

Rusted cars, trucks, and buses form a fascinating collection of Soviet-era machinery.

Two well-hidden huts let animal lovers spend the night among the bears, wolves, and other predators of the forest.

This stoic bronze soldier stands as a symbol of Russian sacrifice or Soviet oppression, or maybe both.

A historic scientific breakthrough that crosses nine borders.

A wooden replica of France's famous tower.

Historic slum of Tartu.

Hundreds of small crosses have been carved into the bark of the trees outside this small Estonian village.

First point in the Struve Geodetic Arc, a 19th century undertaking to measure the Earth's size and shape.

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

Legend says lovers who hold hands while venturing along this stone jetty and kiss at the end will remain together forever.

A forest park outside Tallinn full of architectural and artistic curiosities.

The Guardian of Tallinn.

The oldest church in the Estonian capital is home to over 100 fantastical cemetery coats-of-arms.

This soviet pilot's graveyard is filled with headstones made of airplane fins.

Abandoned Soviet base once stocked with short and medium range missiles pointed at western Europe.

This old Estonian mine has been kept like a sprawling time capsule of the local shale industry.