This Sheffield sculpture composed of 17,000 Allen keys honors both urban falcons and a furniture icon.

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

This monumental fountain has moved around the city multiple times.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

An eccentric memorial garden to the "warrior" birds of World War I, the messenger pigeons used by the Allied forces.

It was once the longest continuously running cinema in the United Kingdom.

Legend says it was constructed with the destroyed pillar of an ancient Greek Temple.

This pink watchtower served as the seat of the Greek government after independence from the Turks.

Breathtaking and huge 430 year old maps of Italy.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

This house was home to a succession of park keepers for more than 90 years, but in all that time, it never had a toilet.

Cemetery established by the Victorians as a solution to the overflowing graveyards.

One of the last remnants of the Bessemer process that revolutionized steel production during the industrial age.

Located behind the Riverside Pub is a nautical fantasy from one of the area's renowned street artists.

This magnificent mural was created with over 30,000 colored bricks.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

This tiny museum's sizable collection is jammed into a former underground public toilet.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

This bridge was constructed from the rubble of the infamous Bastille.

These lights mark the area of Rotterdam that was bombed and burned in 1940.

A huge teapot illuminates a home for the elderly.

A statue of the second-tallest Dutchman in history.