The "Black Arch" guards the entrance to the picturesque Glens of Antrim.

These coffin-like Brutalist balconies were inspired by a nearby mine.

An 11th-century runestone decorates the halls of Terminal 2 of this Scandinavian travel hub.

An icon of International Style architecture on the outskirts of Rotterdam.

A museum dedicated to one of Paris’s most famous residents, tucked into a corner of one of the city’s most famous squares.

This unique building in the main square stands out among the city's typically Baroque architecture.

On an island south of Iceland, a large volcanic rock formation resembles an elephant.

This French castle is said to have once held the Holy Grail but is now a gorgeous mountaintop ruin.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

A statue honors the children who fought Nazis in Poland.

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

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

A sculpture of graceful storks sits atop this fountain in Independence Square.

This Neolithic passage tomb forms part of a World Heritage Site.

The modern birthplace of Irish freedom.

Guatemalan womanizer, venerated during Holy Week.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

An ancient fortification lives on in this Chinese city.

The last king of Poland was interred in this church nearly 200 years after his death.

This 16th-century monastery was founded to cloister the daughters of wealthy local families.

The former stronghold of the Malla Dynasty has remained virtually unchanged since the 17th century.

Although resembling a grand Buddhist temple, this structure is actually the largest mosque in China.

This ancient cave temple complex is the largest and best-preserved temple complex in Sri Lanka.

This representation of Lord Vishnu is the largest stone sculpture in Nepal.