An exquisite Baroque church in Vienna's old town.

The solemn exterior conceals an opulent interior of this 17th century church.

On a winding Vienna side street, one museum has turned their windows into a monument to history’s peace-minded heroes.

A striking Soviet memorial commemorates the liberation of Belarus from the Nazis.

The pioneer of psychoanalysis spent the final year of his life here, still seeing patients on that famous couch.

Installed at a chaotic intersection, this gave London traffic cops a place to hang their heavy woolen coats.

Once standing on solid ground, this slender beacon is a victim of the very shoreline it was charged with announcing.

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

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

A student driver's nightmare.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

London's smallest police station is barely the size of a phone booth.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

A cluttered and astounding collection of antiquities and curiosities.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

The anatomical-pathological collection of a man who changed surgery.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

In addition to fine dairy products, the world's most beautiful milk shop also offers a feast for the eyes.

Too much gossip or just missing curfew could land you in here for a couple of days.

A stone marker and sculpture in the city of Riga stake a claim for the very first community Christmas tree.