A late-medieval Dutch castle with trick fountains in its whimsical water gardens.

An idyllic hotel that gave its name to a supposed shadow government.

A grassy pyramid named after a French battle.

The elegant manor house where Kaiser Wilhelm II lived in exile after World War I.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

A man's head is enshrined beneath a statue near the first building constructed for the modern Olympic Games.

A Dutch museum preserves the world's most diverse collection of vertical slices of soil.

A historic observatory now an astronomy museum beautifully situated at the moat of the Middle Age city centre.

The world's largest bicycle shelter can hold more than 12,500 two-wheelers.

An alien landscape on the banks of the Aegean Sea.

These artifacts were discovered during the construction of the airport, with some dating back to the Neolithic period.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This medieval "painted village" is famous for its geometric facades.

This 11th-century Greek monastery has renowned mosaics and relics of a brutal past.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

A crushed gate and giant bronze head serve as a reminder of Greece's fight for freedom.

Where commuters walk through remnants of an ancient Greek necropolis.

A sharp sculpture made of thousands of pieces of jagged glass.

The rocky remains of an ancient Greek forest.