A rather unusual, if not whimsical, art installation that would make Alfred Hitchcock proud

This late 18th century canal tunnel has an unusual feature to improve the life of the draught horses

The largest stretch of the Berlin Wall is right on top of the former SS headquarters

An empty bookshelf commemorates the books which were lost during the infamous event

At high tide this strange footbridge appears to have no purpose whatsoever.

This Scottish bay still reveals evidence of its days as a seaside swimming pool.

This 19th-century monument served an important purpose for fishermen thanks to its built-in barometer.

The small Scottish townhouse where the "Father of the National Parks" was born.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

Europe's official "zero-level," the equator of elevation.

A public urinal so pretty, it was declared a national monument.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

This large copper bolt represents the benchmark for measuring sea levels in most of Europe.

The former home of a mad diplomat is said to still be marked in bloody, arcane scrawls.

A series of markers along one side of an Amsterdam canal memorialize the Jewish residents from the other side who died in the Holocaust.

The mirrored section takes the shape of Hebrew characters when viewed from above.

The world's oldest Jewish library was founded by Sephardic Jews in 17th century Amsterdam.

Amsterdam's former hotspot for public executions and dissections.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

Widely advertised as Amsterdam’s narrowest street, this passage was once a highlight of the Red Light District before its windows closed.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

A statue commemorating 'the greatest inhabitant of Amsterdam of all time.'