Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

Once the private home of China’s most legendary tycoon, getting inside this stunning mansion no longer requires an elite pedigree or acts of daring.

This extensive collection of dead bugs may be the world's most idiosyncratic and personal insect museum.

Sacred Buddhist home of some spiritual monkeys.

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

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

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

A marvel of Byzantine engineering under the streets of Istanbul.

A geometric jumble of homes.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Cold war icon and onetime "hole" in the iron curtain.

The largest and most famous wax anatomical collection anywhere in the world.

An incredible menagerie of more than 3 million taxidermied animals at the oldest science museum in Europe.

The oldest operating pharmacy in the world features 800-year-old recipes.

France's most famous cemetery, with some of its most curious tombs.

Dedicated to the art of hunting, with juxtapositions of contemporary art.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

Art Deco and “Wrenaissance” mash-up, this recently restored royal residence has been home to kings and comes with secret monkey passages included.

Abstract dinosaur models in London.

Putting the "mod" in "modular" since 2000.