Stunningly detailed mosaics in a New York subway station bring life to the Weimaraners of artist William Wegman's work—and to thousands of commutes.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

Before online banking and smartphone apps, there was "commuter banking" in the subway in Downtown Brooklyn.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

This former insane asylum now holds a pathological anatomy museum.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

Collection dedicated to funeral rites, equipment, and mourning rituals of the Viennese.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

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

This crucial gathering spot along the "hippie trail" still displays old notes between traveling beatniks and backpackers.

A fountain standing as a testament to a doomed alliance.

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

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

The most metal church of all time was built in record time because of an international, pious pissing contest.

Climb a set of vertiginous stone steps to the top of this impressive ancient edifice.

Step back in time and witness the fall of Constantinople.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

This museum was invented in a novel before being made real by the author.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

The largest Neolithic ruins in the world hide a notably clean prehistoric metropolis.

Roman ruins, natural methane fires and a lovely beach.

Flames have been burning within this mountain for more than 2,500 years.