The fading, forgotten remains of a once bright and booming factory.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

A natural history wunderkammer in the middle of the desert.

This collection of neon icons is preserving Arizona's history, one sign at a time.

You don't have to be a diplomat to visit the so-called Camp David of the West.

A black and white painted wall creates an optical illusion in the California desert.

A giant knight, sex education, date shakes, and Jesus coexist happily in this Coachella Valley desert oasis.

The so-called "Bridge of Thighs" in Palm Springs allows nudists to discreetly cross the road.

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

A monument to Malchik, a stray dog who lived in a Moscow metro station until his tragic death.

Dozens of padlock-trees along the Moscow River.

An early-20th-century "dacha" village of quaint cottages curiously located in a modern part of Moscow.

The tallest hotel in Europe.

Museum design and public transportation meet in this unique Russian train car.

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

Moscow's imposing monument to the Space Age.

Moscow's most popular cemetery includes the graves of numerous cosmonauts.

Former headquarters of the KGB.

Its front wall is striped with a menagerie of fantastic beasts and magnificent monsters.

Back in the tiny USSR.

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

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

It took over half a century but a Russian monument to a famous and tragic space pup finally stands in Moscow.

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