The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

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

Boats must transform into railroad cars to navigate this Polish canal.

The two abandoned overpasses are among the largest bridges in Poland.

A memorial to the murdered Jews of Kaunas.

A 300-kilogram egg sculpture that embodied a neighborhood revival.

The Frank Zappa fan club erected this monument to their prog-rock hero to mark a new era of post-Soviet Lithuania.

Legend has it that Napoleon Bonaparte fell in love with this Gothic church.

While this monument tile is shrouded in mystery it also marks the end of the longest ever human chain.

This former KGB building is now a museum memorializing the people who suffered during the Soviet regime.

The pyramid and dome deep inside the Dzūkija forest are believed to channel divine energy.

Open-air museum with a large collection of Soviet-era statues.

The first museum dedicated to exploring humanity's cultural relationship with the celestial world.

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.

Lithuania's outdoor sculpture trail of wooden folk art.

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

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

This charming Latvian lane doubled as Baker Street on the Soviet Union’s version of Sherlock Holmes.

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

3,000 market stands in five former Zeppelin hangars.

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

This impressively complicated radioastronomy research center was once a tool of Soviet spies.

This former Nazi labor camp is now a poignant memorial, complete with giant Soviet-style monuments.