Resting place and mausoleum of the founder and first president of Turkey.

This crumbling medieval basilica once attracted pilgrims by the thousands to collect a miraculous dust that formed above the saint's tomb.

This church houses the tomb—but not the remains—of St. Nicholas, the likely progenitor to Santa Claus.

Ancient serpentine sacrifice holder that has stood the test of time.

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

A fountain standing as a testament to a doomed alliance.

This famous city eluded concrete detection until the early 2000's.

Hidden just under the waters around this Turkish island are the ruins of a once great city.

The best-preserved ancient theater in the world.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

A marvel of Byzantine engineering under the streets of Istanbul.

A seven-century-old jail tells a not-so-pleasant history of crime and punishment.

A maze of crosses marks the jumbled divide between the Netherlands and Belgium.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

An idyllic hotel that gave its name to a supposed shadow government.

The largest airborne operation in history was launched to capture this bridge.

A set of beech hedges planted in the 19th century forms a tunnel that takes on a different appearance in every season.

The tallest waterfall in the Netherlands is a lovely, stepped feature that is only 50 feet tall.

Rich with fauna and flora, nature-lovers can walk across the sea at this UNESCO World Heritage spot.

The struggle of a small Dutch island against the sea.

A cemetery in the Netherlands honors Soviet soldiers from World War II.

A first-of-its-kind circular bridge for cyclists.

This towering church is home to a world-famous organ and a treasure trove of medieval art.

Oldest Museum of the Netherlands is a true cabinet of curiosities.