The largest catacomb system in the world.

A monument to Lenin has been transformed into a statue of everyone's favorite black-helmeted, fool-choking Sith Lord.

Legends of time travel and magical woodland creatures bolster the natural charm of this verdant sanctuary in the midst of Moscow.

Roman ruins top white travertine terraces formed by ancient hot springs.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

An old vending machine serves up unpredictable beverages from its seemingly magical insides.

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

Rippling sand dunes frozen in the Arizona rock.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

Following the trail of an old metro line, this scenic path is haunted by a creepy spriggan statue.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

A museum dedicated to controversial Russian pianist Alexander Scriabin.

The "Mystery and Company of Merchant Adventurers" is an Elizabethan-era hangout in Moscow.

A Yiddish theater turned movie house turned rock and roll landmark turned gay disco turned bank.

The artist and New York City icon lived, worked and died in this converted carriage house owned by another iconic artist, Andy Warhol.

This 220-year-old house is a reminder of New York City's Dutch past.

The competition: breathe deeply as long as you can.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

A legendary speakeasy bookstore returns from the brink.

The saddest little diner in New York.

Unrepaired walls from a 1920 anarchist bomb attack.

Cryptic messages embedded in the New York City sidewalk.