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

This giant temperature attraction created some giant electric bills.

Experience a charming 1930s version of "infotainment."

The world's most active stratovolcano is almost always erupting.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

On this island, you suck away your garbage via an elaborate pneumatic tube system.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

The remains of a 19th century spring, and the site of an infamous unsolved murder.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

The world's largest solar furnace uses 10,000 mirrors to concentrate the sun's rays to generate power.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

A farm in New Jersey grew a most unusual crop for AT&T's testing purposes.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

Ever wanted the laymen's version of your credit card fine print?

A collection of 20th-century automata, penny arcade games, and musical contraptions.

A mysterious air force base built to resemble a Long Island fishing village.

A miniature train-ride through Slovenia's largest cave system.

A walk through the historic city center, under the streets of Seattle.

Megachurch turned Catholic church comprised of 10,000 glass panes.

The first American department store, and home to the largest operating musical instrument in the world.

Rummage through this sunken ship, but leave your scuba gear at home.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

Concrete strongholds stand guard over the Golden Gate.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world’s largest coastal brick fortresses.