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

A subterranean house of worship carved right out of the bedrock.

Museum dedicated to the terror regimes of Hungary.

Buildings that dynamite couldn't bring down were abandoned because of bathroom issues.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The mystery of this small, brick pond eluded its possibly only investigator until his death.

Largest island in the Baltic Sea experiences such idyllic weather that roses bloom in the middle of December.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

Immortalized by artists, this church incorporates a medieval lighthouse into its shoreside structure.

One of the highest emergency huts in the world has been waiting almost a century to give imperiled climbers a place to lie down.

Public access to clean drinking water was an instant hit among the masses.

The oldest bridge in South Carolina may have been designed by the same man who created the Washington Monument.

Need to book a room at the Hotel Pennsylvania? Just dial up 6-5000.

This Victorian-era public house has set the standard for pub-style elegance for over a hundred years.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

This amazing pedestrian suspension bridge in the Swiss Alps would give Indiana Jones nightmares.

This futuristic German television spire is actually the world's largest digital clock.

This massive steel pyramid can be entered by a set of jagged steps that let visitors stand in its heart.

This historic stone bridge has an entire neighborhood clinging to its sides.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

A Norwegian church that was built before Wisconsin was even a state has been entirely moved to a nicer spot.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.