The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

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

Honoring the star of the “The Bob Newhart Show” which took place in the city of Chicago in the 1970s.

The palatial McDonald's that inspired Wesley Willis.

Rifle through images of skyscrapers, Worlds Fairs, and more in the largest public postcard repository in America.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

A marvel of Byzantine engineering under the streets of Istanbul.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

A sixth-century Byzantine cistern hidden below a modern carpet store.

Ancient serpentine sacrifice holder that has stood the test of time.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

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

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

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

A self-built castle made by a mysterious man.

The unusual burial monument of Arizona's first governor.

A geological mystery on Camelback Mountain.

The handsome statue is a tribute to the post riders who traversed 52 miles of tough Arizona terrain.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

This 1930s log cabin began as a taxidermy museum but is now a popular country music venue.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.