As its grandiose name implies, this wooden dome is unsurpassed in size.

This lone tree and dramatic sandstone outcropping are so beloved by Michiganders they can be found on one of the state’s coins.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

The palatial McDonald's that inspired Wesley Willis.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

The oldest experimental corn field in America is still creating better ways to grow crops.

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

In the Shawnee National Forest, amazing rock formations peer through the treeline.

A historic, scenic mill that was forced to close due to overlogging.

A city park that sits on top of a freeway.

This downtown Dallas art installation is always on the lookout.

A symbol of Texas pride.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

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

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

The atmospheric ruins of a historic church can be found on a hill above the city of Oviedo.

Two large posteriors in one giant statue.

This beautiful spit of land was once the summer playground of the king of Spain.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.