This micro-nation may be some sort of prank, but its constitution sure seems official.

Dedicated to the untimely death of American balloonist and parachutist.

The first monument in Estonia that was made by an Estonian sculptor.

A unique sculpture calls the outside of this steakhouse home.

This set of concrete chambers resonates according to different notes of octaves.

A medieval setting reimagined into a unique art alley.

This striking memorial is one of Estonia’s most controversial Soviet leftovers.

Relics from an era long gone, sit idle outside this Estonian museum.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

"There's nothing there," and other lies the KGB told us.

Internet rumors, often involving Icelandic singer Björk, have abounded regarding this isolated outcrop of rock.

Houses are tucked between, on, and underneath giant boulders.

A swath of France so devastated by war it is still forbidden to go there.

Now overgrown, these anti-tank barriers from World War II are sometimes called "dragon's teeth."

This building’s ghostly exterior reflects its former lives as a prison, school, and funeral home.

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

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

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

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

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

Notorious artist squat renovated into legal studios.

This magenta statue commemorates the legendary marriage between a mermaid and the city's founder.

In the heart of Luxembourg's "little Switzerland" weaves a breathtaking natural sandstone canyon with a mythological past.

Two standing giants remain as a tribute to Luxembourg's metallurgical past.