A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

View the ancient remains of buildings and the ancient "River of Hades" before hopping on a train.

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

One of the newest mosques in a city filled with thousands.

An Art Nouveau gem hides beneath the layers of city grime obscuring this once-magnificent building.

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

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

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

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

This arch granting triumphal entrance into Antalya was designed to honor the emperor's visit.

The oldest active church in Pennsylvania is also the second oldest Swedish Church in the United States.

A daily replay of the experiment that proved the rotation of the Earth.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

This elaborate towering structure was once famed for its revolutionary height.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

Dr Barnes' $25 billion private collection of art and arboretum.

Yo, Adrian!

The first American department store, and home to the largest operating musical instrument in the world.

Huge masonic hall in Philadelphia with lavishly themed rooms.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The site where Poe “in great distress, and ... in need of immediate assistance” likely died.

A museum, walk-through diorama, and library nestled under one castle-like roof.