This ancient structure is widely thought to be the oldest intact pyramid in the world.

A sculpture dedicated to this town’s rich shipbuilding heritage.

The castle that provided the setting for much of 'Monty Python and the Holy Grail' is now a pilgrimage site for fans.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

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

Byzantine emperors ruled, lived, and died in this 13th-century palace-turned-museum.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

Have tea in a cemetery with a dazzling view of Istanbul.

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

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.

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

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

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

A marvel of Byzantine engineering under the streets of Istanbul.

Once a luxurious flagship of the Soviet Union, this Brutalist structure remains a landmark of Tashkent’s communist past.

Controversially restored in the 1970s, this giant 15th-century mosque is shrouded in legend.

Prowl through this sprawling bazaar under a massive Soviet-era dome for delicious eats.

An underground world of gorgeous, palatial metro stations designed as a nuclear shelter complex.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

The Avenue of Mausolea is a series of grand palatial tombs.

Hidden on a cobblestone street in Glasgow, a Czech Cajovna-inspired teahouse serves as a hangout for Bohemians.

The pub has been in operation since 1819 on the banks of the Clyde.