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.

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

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

This magnificent museum claims to house the cranium of a disciple and the skull of a pope.

A fearsome dragon clings to a corner of Munich's city hall.

Go surfing on this urban wave, "hacked" by local surfers.

The last bastion of Roman presence north of the Alps looms over a German town.

This lurid German fountain plots the sad course of marriage from dating to death.

King Ludwig I's collection of beautiful women.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

The footprint of a frustrated devil in Munich's Cathedral.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

The prototype for all Nazi concentration camps.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The fairy tale castle of the "fairy-tale king."

This giant iron playfully pays tribute to an early 20th-century architectural trend.

Down the road from where the Wright brothers lifted off is another flight tribute practically hidden from sight in the woods.

This rare basilica nestled right in downtown Asheville is an architectural marvel, inside and out.

This North Carolina museum is keeping the pinball craze alive, with a little Space Invaders on the side.

This hidden jockey “walk of fame” celebrates the winning riders of the Kentucky Derby.

The world's longest known cave system.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

The curiosities and wonders of pharmacy in a delightful historic building.