135 bronze medallions mark a French meridian line which once rivaled the hotshot Greenwich timeline.

Architect Le Corbusier built his friend a cubist house to match his impressive collection of cubist art.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

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

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

One of the most photographed locations in the entire city.

Backwards hour and minute hands and a timing mechanism that fluctuates with the temperature led to this clock tower's local nickname.

Structure built from the skulls of vanquished foes.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

This memorial to the victims of the Romanian Revolution of 1989 is often compared to a potato on a skewer.

Romania's triumphal arch looks out over Bucharest.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

Real bones which are said to have belonged to a Polish dragon.

The oldest housing complex in Riga is a mini timeline of architectural trends.

The reconstruction of this prominent building fulfilled a long-written command.

This charming Latvian lane doubled as Baker Street on the Soviet Union’s version of Sherlock Holmes.

Flamboyant architecture from the turn of 20th century.

A black cat protests the City Guild in Riga's Old Town.

Ever-growing collection of devils in art.