This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

The final resting place of 19th-century sailors previously banned from being buried within Portuguese Macau.

This statue once earned the distinction as one of the "Three Major Disappointments of the World."

The busy transport hub is home to the tallest airport slide in the world.

This $62 million dollar temple was erected to house one little dental fragment of religious history.

The ruins of New Zealand's largest classical-style church.

Three rooms of bones, curios, and one artist's collection of natural artifacts create this intriguing museum.

One of New Zealand’s few castles boasts beautiful gardens, grand architecture, and a history filled with family drama.

The glacier tucked within a New Zealand rainforest.

A glacier pocked with ice caves and surrounded by rainforests.

A section of the long chain that blocked enemy ships from entering Constantinople.

This half-forgotten fortress was constructed by the Ottoman conqueror of Constantinople.

The legendary luxury train passage is commemorated with a charming museum inside its former eastern terminus.

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

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

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

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

Turkish adventurer antiques in the heart of the Grand Bazaar.

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.

This 135-year-old weather station studied the effects of the climate on human health.

On Gellért Hill, this statue depicts the tragic tale of lovers divided by the Danube.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

A unique hotel for the artistic soul.