The world's tallest turtle riding the world's largest snowmobile.

Once disputed as the largest sundial in the world.

A second generation sun-powered marvel lights up the night.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

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

This California tree is the single source of the state's entire orange industry.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

Giant nude woman of Tijuana is also the artist's home.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

An iconic Soviet statue of working-class people.

A solemn, monumental, kitschy palace of worship honoring victory in the Great Patriotic War.

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

One of the last examples of Soviet architectural propaganda has a few technological tricks up its sleeve.

Gargantuan home of Russian science.

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

Home of the future Emperors of Russia.

Dozens of padlock-trees along the Moscow River.

The tallest hotel in Europe.

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

Former headquarters of the KGB.

Museum celebrating the achievements of the Soviet space program.

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