This 11th-century structure is one of the oldest churches in Romania.

Visit an imposing 13th-century Transylvanian citadel lurking not far from the region's more heavily touristed attractions.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

This Transylvanian church has changed its denomination four times.

A remarkable medieval structure born from a 14th-century disaster.

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.

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

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

This crucial gathering spot along the "hippie trail" still displays old notes between traveling beatniks and backpackers.

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

Eat your way through history.

This public amphitheater was once a key part of Monaco’s defense strategy.

A memorial to honor those who were killed in a Bastille Day terror attack in Nice.

This saucy statue once caused outrage among locals.

This enormous 32-foot painting depicts Poland's greatest medieval battle in glorious detail.

One of the world's largest collections of medieval religious art.

This once-derelict building is now one of the most beautiful bookstores in the world.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

This glass-stain Mary attracted thousands of pilgrims until her head was shattered by a vandal with a slingshot.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

Though it may look like it’s missing its outer shell, this skeletal cast-iron tower was built to withstand wind and waves.

What looks like a suicide in progress is actually a statue of Sigmund Freud.