One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

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

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

Discover for yourself what Herb Caen referred to as "the best kept secret in the Bay Area."

A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

Swarms of butterflies cannot compare to the awe inspired by the publicly-funded nakedness once displayed in this sunken garden.

Enter the cabin of a life-sized Hindenburg replica.

France's most famous cemetery, with some of its most curious tombs.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

This ancient burial mound is accessed by an impressive Greek-built archway.

A castle perched precariously over the Crimean Sea.

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

A model village fit for an emperor.

The world's first museum dedicated to the work of game-changing naturalist Charles Darwin.

Gargantuan home of Russian science.

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

Moscow's imposing monument to the Space Age.

The tallest hotel in Europe.

Stalinist skyscraper built with help of cryotechnology.

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