These Finnish rapids have been attracting tourists for over a hundred years and are now released with the push of a button.

The smallest restaurant in the world.

This lake-bound geographical marker sits at the point where three European countries intersect.

A subterranean house of worship carved right out of the bedrock.

The laboratory where the Soviet secret police invented exotic poisons used to kill dissidents in hideous and (mostly) untraceable ways.

An unusual abandoned church damaged in World War II sits in a small village outside Moscow.

This newly renovated Soviet-era outdoor exhibition center is bigger than the principality of Monaco.

Stalin's march toward a more modern USSR flooded a monastery, leaving a unique and extravagant nautical marker, "The Flooded Belfry."

An unusual collection of self-made musical instruments and unique noises.

Specimens collected by the author of "Lolita" and self-taught lepidopterist are exhibited in his childhood home.

Dozens of padlock-trees along the Moscow River.

The avant-garde design was able to bypass strict Soviet regulations on architecture.

A remote forest of stone pillars along the Lena river.

The world's second-largest excavated hole.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

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

It's hard to believe the dizzying patterns covering this abandoned mine are completely natural.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

Dr. Strangelove-esque tours reveal the inside a bunker once reserved for Stalin himself.

This unassuming museum's slogan translates to “there is a limit of sadness, anxiety has no limits."

2300-year-old Roman road connecting the empire.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

A little-known park with unusual, half-ruined structures and a mystical energy.

The hallucinogenic center of the ancient world.