The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

Only a few pieces remain of the structure that carried people and goods across the Thames for some 600 years.

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

A stunning architectural yet functional feat, towering over Oslo.

Oslo's historic toboggan run has been letting thrill seekers slide from train stop to train stop for over a century.

An abandoned tank sits in an empty London lot as a symbolic middle finger to local city planners.

Legend has it this gnarled old tree was planted by Tsar Peter the Great during his visit to London.

These morbid carvings remind churchgoers of the inevitability of death.

The bridge that cost Germany a World Heritage Site.

This unusually shaped mountaintop tower looks like a UFO floating over the city.

This beautiful Victorian ironwork masterpiece was built to keep London from smelling like poop.

The last resting place of the famous Native American princess is marked by a haunting monument.

Metal horses galloping through a London fountain provide a link to the city's past.

Murals of the wild parties once held on the frozen River Thames.

The arching stretch of London's longest street holds many reminders of the area's maritime past.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

The "Heroine of Dunkirk" rescued over 7,000 Allied troops during the historic World War II evacuation.

This foreboding medieval castle was twice besieged by barons rebelling against the English king.

This stone amphitheater was once part of Nazi Germany's plan to promote propaganda.

A Victorian school for poverty stricken waifs has been preserved as a museum to their donated education.

Down a pint of ale where the Bishop of Ely's servants slept in 1546.

London's only public statue of the much-married monarch adorns the gate to St Bartholomew’s Hospital.

Remnants of cells from the most notorious London prison may lie in the basement of a rare Victorian Gin Palace.

Public access to clean drinking water was an instant hit among the masses.