The first declared National Monument in the United States.

The high point on the 16th president's eponymous roadway is marked by a massive version of his head.

A popular rock that acted as a waymarker for American pioneers.

What happens when a sculptor has to find a way around a 100-year-old copyright.

Bird dung painted this huge boulder which in turn inspired the name of a city.

Granting the right of way to ships over surface traffic since 1917.

From a neon Rapunzel to a bike traffic meter to a street fair color scheme, the most opened drawbridge in the US is a veritable art gallery.

An old-timey peepshow allows visitors to gawk at some of the world's most freakishly large footwear.

A wall of chewing gum moonlights as collective art.

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

An institution that preserves the history of institutionalization.

An homage to everyone's favorite prehistoric cartoon family.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

A bright little alley in La Boca is a part of tango history.

105-foot wide giant metallic flower blooms anew every day in the heart of Buenos Aires.

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

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

Stalinist skyscraper built with help of cryotechnology.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

A tall karst islet popularized by 007.

A shrine built to combat the bad karma of a commercial venture.