The same family lived in this Victorian house for nearly 100 years without altering the building.

Noble beasts perhaps, but not the Emperor's dogs.

A Barbary Coast watering hole built into a Gold Rush shipwreck.

A collection of memorabilia from the Beat era in the back of a San Francisco bookstore.

One of the last remnants of the city's Chinese nightclub scene is now a dive bar selling killer mai tais.

Gold Rush ship-turned-hotel buried underneath San Francisco's financial district.

An art supply shop holds the secrets of this quiet neighborhood's raucous Barbary Coast past.

The oldest alley in San Francisco is paved with a reminder of the city's original shoreline.

An often overlooked ancient site in downtown Athens with substantial history (and nature).

A preserved portion of an ancient Athens barrier is displayed in a hotel basement.

According to legend, this ancient column contains healing properties.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

These ancient ruins hide in plain sight next to a dessert shop.

The ruins of this ancient fortification wall sit in the middle of a quiet, residential intersection.

Legend says this sacred tree was a gift from goddess Athena.

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

The ruined doorway is a portal to the building's turbulent and torturous past.

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

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

This striking sculpture of Icarus honors Greece's fallen flyers.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

Enormous sandstone towers loom within a Czech forest.