Krakow's own version of the Hollywood Walk of Fame.

In the summer, the area around this sculpture transforms into a vibrant concert venue.

The Tudor-style cottage in the middle of the square is not quite what it seems.

This luxury shopping lane has been protected by its own tiny police force for over a century.

At the top of the hour, figures of the London department store's two co-founders emerge and bow to each other.

Colorful murals by Jean Cocteau hide within this peaceful London sanctuary.

The medieval woodcut-style artwork chronicles life in medieval London.

This coffee shop lies hidden beneath a historic church.

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

An abandoned saucer-shaped monument in the Bulgarian mountains.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

This tiny Bulgarian town offers a stunning location in the mountains and a storied history.

This historic black and white monastery is one of Bulgaria's architectural jewels.

A striking symbol of the Bulgarian capital.

"Holy Wisdom" overlooks the city that became its namesake.

This biographical museum honors the groundbreaking scientist at her birthplace in Warsaw.

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

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

A statue honors the children who fought Nazis in Poland.

This bell stars in a tragic love tale and is said to make wishes come true.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

Special benches that play Chopin's music are scattered throughout his native city.

A 20th-century picture show in 3-D.