Only six people can sit inside this delightfully quaint sanctuary.

A multi-storied adobe complex has been inhabited for more than a thousand years.

An architectural marvel built by a nearly forgotten Canadian Quaker sect, the Children of Peace.

Within the church are the relics of the martyrs St. Jean de Brébeuf, St. Gabriel Lalemant, and St. Charles Garnier.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

A moving memorial to the fallen and missing from WWI trenches.

This memorial museum chronicles the apocalyptic destruction of the First World War.

Each time a baby is born in Ghent, these streetlights flash in silent celebration.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

A marvel of Byzantine engineering under the streets of Istanbul.

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.

No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

1513 Turkish world map, full of European state secrets and snarky commentary.

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

The world's largest frame offers spectacular views of the city's past and present.

This futuristic building is yet another architectural wonder in Dubai.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

This indoor ski resort has a mountain contained inside a mall.

Whitewashed mosque contains the world's largest carpet.

The supreme shrine of the state.

A unique structure located on the grounds of one of five grand palaces that were built by the Joseon dynasty.

The world's longest bridge fountain has hundreds of nozzles that create a beautiful, illuminated spectacle.