The widest natural waterfall in Estonia is a sight to see in all seasons.

For the last century, this international border within a small town has appeared and disappeared various times.

The Guardian of Tallinn.

The oldest church in the Estonian capital is home to over 100 fantastical cemetery coats-of-arms.

Only a fragment of this 15th-century Dance of Death survives today.

A decommissioned submarine base makes a great space for graffiti art.

A masterpiece of Art Deco architecture hidden in plain sight in West London.

A haunting monument dedicated to the Royal Naval Air Service and the Fleet Air Arm.

Chelsea's soldiers were given strict orders when crossing this historic bridge.

An eccentric Victorian aristocrat's enormous collection of medieval armor and weapons from around the world.

This iconic high-rise residential block was one of the last to be built in the Brutalist style.

The Great Fire of London and the regulation of one-way streets both started in this alley.

The medieval woodcut-style artwork chronicles life in medieval London.

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

Legend has it that seven Anglo-Saxon kings were coronated on this stone, located in the appropriately-named town of Kingston.

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

A sculpture outside London's oldest cathedral honors the Mohegan chief who died while petitioning the king.

This ancient Egyptian obelisk still bears the wounds of World War I.

The Art Deco artwork depicts gilded carriers of deadly illnesses.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

One of the figures in this Celtic sculpture continues to puzzle archaeologists.

A bronze bust commemorates the heroism of the secret agents who led covert operations against the Nazis.

A portly statue of a golden boy commemorates an unusual cause of the Great Fire of London: the sin of gluttony.