150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

A Byzantine-era church hidden in a wooded area below the Acropolis.

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

Where commuters walk through remnants of an ancient Greek necropolis.

An ancient octagonal weather station named for the eight Greek gods of wind.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

A view-altering observatory at the University of Texas.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

The upstairs reading room is packed with millions of rare books, literary manuscripts, and historical treasures.

Turning night into day in Victorian-era Austin to thwart a serial killer.

Austin’s nonprofit-run graffiti park where street art is meant to be painted over.

One part antique store, one part curiosities hodge-podge.