The private clubhouse for the members of the Academy of Magical Arts.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

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.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

This former luxury resort in Kaua'i is now an abandoned relic.

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

A 16th-century Andalusian palace.

The world's largest wooden structure.

The final resting place of the great navigator, or maybe his brother.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

A lush indoor jungle fills this bustling Madrid transportation hub.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

A colorful architectural gem in Seattle's uniquely modern Central Library.

This semi-secret garden in south Seattle emulates a traditional Japanese garden using the plants of the Pacific Northwest.

A museum dedicated to the history and exploration of both popular music and science fiction.

A walk through the historic city center, under the streets of Seattle.