Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

A little slice of Japan and its aesthetics in London's Holland Park.

The hippo that stands on this university campus was once a drunken flea market purchase.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

This unassuming passageway played a key role in one of the most important events in U.S. history.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

An overlooked memorial honoring the local Washington residents who died in World War I.

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

Paris' linguistic guide to the international language of, yes, love.

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

A beautiful Victorian statue shows France's enduring love of the rhinoceros.

This emotive sculpture was originally created for the 1878 World's Fair.

Notorious artist squat renovated into legal studios.

This popular tourist cave was ignored for almost 200 years before being mined into an attraction.

The legendary giant's severed hand sits on Antwerp's popular shopping street.

This former guildhall with a bacon-like exterior is now home to a museum covering 600 years of Antwerp's musical history.