This 700-year-old temple is one of the city's oldest.

A collection dedicated to the treatment of disease, held in London's oldest hospital.

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

This plaque in one of London's oldest public hospitals commemorates the first meeting of two of Britain's most famous literary heroes: Sherlock Holmes and Dr. Watson.

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

A plaque hangs near the execution place of the Scottish Independence leader famously depicted in "Braveheart."

One of London’s rare Tudor-era buildings is a fate-defying gatehouse for a church.

The oldest standing Byzantine church in Athens is tucked within a monastery in the middle of an upscale shopping district.

This small chapel holds the mummified heart of one of the heroes of the Greek Revolution.

Large collection from the 3rd millennium BCE.

A sharp sculpture made of thousands of pieces of jagged glass.

A grotesque collection of wax limbs depicting the symptoms of venereal disease.

This natural sandstone bridge hasn't been seen since the 1960s when Lake Powell covered it—until now.

Though this bridge was originally built in the 12th century, only one of its 10 arches dates back that far.

At almost 900 feet long, this is Bulgaria's longest suspension bridge and the only way to reach the small village of Lisitsite.

A rotating bridge that carries a little canal over a larger one.

An impressive bridge over a ravine also served as an aqueduct.

The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.

The strip club's VIP lounge is actually a rare repurposed Futuro House.

One of the most easily accessible examples of the rare 1960s UFO houses.

An 18th-century estate owner thought these cottages were an eyesore, so he artfully disguised them as a church.

This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

This enigmatic building features numerous architectural styles.

The single richest source of elemental discoveries in the world.