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

Take a walk in a recreation of ancient Rome.

This monolithic slab of art metal crowns a German slag heap.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

The smallest post office in the United States is no bigger than a broom closet.

These stark white cliffs were spat up by the sea and are slowly being retaken by it.

The modern birthplace of Irish freedom.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

A geological mystery on Camelback Mountain.

See massive fossils that are over 200 million years old in northeastern Arizona.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

What once sat in the world’s spotlight is today a largely disused ghost complex.

Miraculous tree that seems to sprout out of solid rock.

A monument to the egos of two railroad magnates that fell into decline along with their careers.

20,000 pieces in a Frank Gehry-designed building.

The only arched bridge made of stone on the entire Mississippi River.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

Giant, friendly pelicans in Central London, the most unlikely of places.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

Mountain where Jesus was first tempted by the Devil.