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

This Communist-era residential block is one of the longest residential building in Europe.

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

The final resting place of more than 200,000 people, this is one of the largest cemeteries in Europe.

A statue honors the children who fought Nazis in Poland.

A striking public sculpture representing the period of martial law in Communist Poland.

A haunting deserted hotel is a favorite with artists and photographers.

The silly symbol for an underground protest group is now scattered around the city.

This fairytale inspired, warped building houses restaurants, shops, and a radio station.

Museum dedicated to "the man who moved the Earth."

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

The site of the first battle of World War II.

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

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

This 700-year-old structure is one of the most unique architectural and historic monuments in Gdańsk.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

Memorial to the lost dead of Gdansk, whose resting places were destroyed during World War II.

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

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

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

This column celebrates Rome's victory over the Goths, and may be the oldest Roman monument in Istanbul.

A marvel of Byzantine engineering under the streets of Istanbul.

The "Little Ones," show Portugal in full miniature splendor.

One of the largest Roman settlements in Portugal.