Macabre museum devoted to historical Viennese murders.

Legends surround an ancient tree trunk riddled with nails for good luck.

An underground city of salt.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

A huge wooden clock that is so beautiful its creator was forcibly blinded.

A mysterious emblem tucked in an small alleyway is actually the coat of arms of a heroic medieval family.

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

Modern art commemorates one of the first military actions of World War II.

This antique thermometer honors the creator of the first universal temperature scale.

This derelict superstructure was a very important warning system for the Soviet military.

The biblical sculpture honors those who lost their lives, homes and communities to the Chernobyl disaster.

Featured in one of the most iconic scenes in cinema history.

This museum explores the tumultuous history of Lviv under Nazi and Soviet occupation.

This unique Lady Liberty is one of the only examples of the figure sitting down.

Monumental sculptures guard many of the graves, transforming this necropolis into an open-air fine art museum.

World's largest crossword puzzle spans the side of a towerblock, its clues scattered throughout the city.

One of the most poignant ruins of the Chornobyl nuclear disaster, the local football team's stadium has been quickly reclaimed by nature.

This attraction was abandoned after the Chornobyl disaster.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

The haunting complex honors the millions of Ukrainians who died in the forced famine under Soviet rule.

When you've got to go, you've got to go.

A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.

These rare statues are one of the few remaining material witnesses to Old Prussian culture.

The deepest metro station in the world.