The facade of this bank has changed little over the centuries, including its unique welcome sign.

A line number in Amsterdam that will likely never be used again due to its tragic history.

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

The decaying remains of a once-luxurious Soviet spa town.

An artistic melting pot inside an old roadside inn from the Ottoman era.

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

A settlement that was stopped in the middle of construction, leaving behind paved roads, curbs, light poles, a stormwater drainage system, and even a basketball court, but no houses.

A series of waterfalls create the illusion of perpetual rainfall in this hidden gorge.

This church combines Christian, Byzantine, and ancient Greek architectural elements.

A dark, narrow tunnel that leads to a charming lake and waterfall.

This quaint farm in the Peloponnese countryside hides an astonishing cache of antique curiosities.

The partially submerged ruins of a white marble quarry used in ancient Greece for over 1,200 years.

After a catastrophic forest fire, a Greek artist transformed scorched tree trunks outside an old sanatorium into this haunting sculpture garden.

These caves secretly held national treasures during World War II.

This black sand beach was crafted from volcanic explosions including the historic Minoan eruption.

This ancient statue of Dionysus lies unfinished and abandoned in one of Greece's oldest quarries.

A miniature desert appears out of nowhere on the lush isle of Lemnos, like something out of a Greek myth.

The historic tower houses of this nearly abandoned Greek town have been compared to the spikes on an iguana's back.

An ambiguous ambience emanates from this centuries old leprosy quarantine.

Abandoned railway line circling the city of Paris.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

Dedicated to a synagogue that was destroyed after having survived World War II.

This Tuscan lake hides a 13th century town that is still visible when the water recedes.

The ruins of an abbey believed to have been founded by Charlemagne in the 9th century.