Structure built from the skulls of vanquished foes.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

A misnamed well, with a deep dark past.

The unusual sculptures are believed to be powerful political symbols.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

Fascinating early attempt at a Jewish autonomous settlement.

This massive glowering Lenin head gazes out over eastern Siberia.

Thanks to a spelling mistake this bizarre beaver-tiger hybrid became the symbol of a Siberian town.

Church built on the site where the last tsar of Russia and his family were killed.

Mostly underground in the old days Back in the USSR, today the Beatles beckon to tourists from a wall sculpture out in the open in central Russia.

Russia's giant concrete QWERTY keyboard is likely the largest in the world.

Russia's own leaning tower was built on a tragic historical fable.

This nostalgic Russian museum is full of USSR cultural artifacts from the 1970s and 80s.

Replica of mosque destroyed by Russia in the 16th century.

This Russian religious complex is a Frankenstein's chapel that includes influence from almost all the major faiths.

Former headquarters of the KGB.

World's largest bell sits on the grounds of the Kremlin in Moscow.

Thirteen sculptures in central Moscow graphically depicting vices of the modern world.

Dozens of padlock-trees along the Moscow River.

A sculpture park of the tossed aside relics of the USSR, from Stalin to a massive Soviet emblem.

One of the world's tallest statues is also one of its most hated.

A surreal pile of colorful junk fills a small yard in an otherwise gray neighborhood.

The oldest museum in Russia is home to a fascinating collection of nearly two million anthropological artifacts and anatomical curiosities.