This peculiar border irregularity is the only way to legally enter Russia without a visa.

This dizzying tower was built to better broadcast the 1980 Moscow Olympics.

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

An ancient knight and a symbol of the city's freedom.

Gargoyle head that brings good luck.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

This surreal memorial/cemetery is a necropolis of crumbling stonework and puzzle-shaped headstones.

Oriental bazaar in the heart of Sarajevo.

This historic cemetery was inaccessible for several years due to dozens of land mines.

This museum preserves the hand-dug tunnel that kept Sarajevo afloat during the Serbian siege.

A war-torn Olympic relic is being overtaken by graffiti and nature.

Bridge that died in war and was resurected.

In the shadow of a former battleground, the resting place for nearly 2,000 soldiers who died in World War I.

A moving memorial to the fallen and missing from WWI trenches.

The site where one of the most famous poems of World War I was composed is preserved to honor the legacy of the work.

This statue dedicated to the story of a Flemish boy and his dog was relatively obscure in Belgium, but a cult sensation in Japan.

A 14th-century fortified keep showcases the masterpieces of an ingenious 20th-century clockmaker.

A little sculpture with a large wardrobe.

A Soviet-style monument, built after transferring the remains of heroes from their graves.

An interactive museum-like experience takes visitors back to 1980s Communist Bulgaria.

This fifth-century church is one of the oldest Christian sites in the Balkans.

An homage to the medieval rulers of Bulgaria.

Rebuilt several decades ago, its striking murals prevent it from being reconsecrated as a church.

Sofia's legislative center is continuously reinventing itself.