A historic chapel filled with colorful murals and a colorful past.

Two innocuous monuments found in separate locations attempt to unite a city.

This family tattoo parlor has been inking religious pilgrims in the Middle East for 700 years.

A serene desert oasis speckled with ancient artifacts.

This ancient tomb in the West Bank is a holy site for Jews, Muslims, and Christians alike.

The feminist fashion collective centering Palestinian craftsmanship and radical transparency.

The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Paris' linguistic guide to the international language of, yes, love.

This massive library holds what was once the largest book collection in the world.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A nostalgic bibliographic gem.

The oldest continuously operating fish market in the United States.

The walls of the iconic dome are hollow and have a secret stairway.

An Industrial Revolution-era public work that purified water using nothing but sand.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.