This may be the smallest length of railway in the United Kingdom.

A sincere and thoughtful art installation, mistaken by many as a statue of a penis.

A quartet of tiled art pieces adorn the floors of this prestigious art museum.

A mysterious shape catches the eye in this 16th-century painting.

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

A pair of club-wielding guardians stand watch over London's first public clock to feature a minute hand.

One of the few remaining examples of 19th-century London’s attempt to clean up its reputation.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

The pretty iron lamp is a reminder of the architecture underneath London's streets.

A series of carved figures that scandalized British society.

An agreement meant to honor the Duke of Buckingham led to this unusually-named passageway near Charing Cross.

A living memorial to the trees London lost during the Great Storm of 1987.

Repository for more than 22 million pickled specimens.

This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

The bones of two medieval royal lions were discovered at the historic fortress.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

A series of playful yellow penguins share a serious message about the environment.

Throughout this shopping mall are medieval ruins that were discovered during the mall's construction.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

This enormous sports car themed amusement park is home to the world’s fastest roller coaster.

This massive piece of artwork weighs more than 250 tons, and was designed as a tribute to the first president of the United Arab Emirates.

Whitewashed mosque contains the world's largest carpet.

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.