A catapult rock from Gotland’s 13th-century civil war is still lodged in Scandinavia's best-preserved medieval city wall.

Archaeologists are still unraveling the secrets of the brutal massacre that wiped out this ancient fort.

According to legend, this boat-shaped henge is built over the grave of a mythic king.

Rubbing the buttons along this statue's coat is considered good luck.

One of the oldest lighthouses in the world has been in continuous use since it was first built in 1531.

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

This celebration of Latvia’s freedom and independence avoided demolition over half a century of Soviet occupation.

A black cat protests the City Guild in Riga's Old Town.

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

The reconstruction of this prominent building fulfilled a long-written command.

3,000 market stands in five former Zeppelin hangars.

Latvia's symbolic mountain-shaped national library is home to millions of cultural tomes.

A small granite monument marks where the borders of three countries meet.

This lakeside bunker complex in Mamerki, Poland, housed the Supreme Military Command of Nazi Germany during World War II.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

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

Launch site for nuclear war against Western Europe.

Sculpture garden of religious statues made it through Soviet rule.

A creepy statue of a hooded ghost hauls itself up from the water in a historic Lithuanian city.

A narrow strip of land is home to the tallest migrating dunes in Europe.

One of the last remaining railway viaducts equipped with a transporter ferry.

Down this yellow brick road, visitors are treated to toadstool houses and massive mushroom sculptures.

Considered the birthplace of the Copper Age and Bronze Age, the river is tinted red from 5,000 years of mining.

The world's largest wooden structure.