This whimsical seashell-shaped place of worship was designed to blend into its surroundings.

To truly appreciate Detroit's landmark skyscraper, you have to step inside.

Replicas of Apollo's leonine stone guard cats still line a sacred row in Greece.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

A winding path built in secret on the edge of the continent.

The legendary building that needed ghostly approval before being built.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Elevated freight railway turned wildly successful urban park.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

A seemingly endless landscape of pure salt stretches far across Bolivia.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.