The signs of a long buried road can still be found hidden beneath a London sewer grate.

A hands-off space for graffiti artists to hone and display their skills.

An unusual round church in London with a Templar past.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

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.

Mummies preserved naturally for seven centuries.

A patchwork of ruins from various civilizations in one of the world's oldest continually inhabited cities.

A monumental underground karstic wonderland is also the water source for over a million citizens of Beirut.

The humble tomb of an Argentine general, hand-built by his son using stones brought down from the Andes.

A bright little alley in La Boca is a part of tango history.

A tower devoted to — and modeled after — the Divine Comedy.

Isolated atop this Balinese sea crag is a lovely Hindu temple that is said to be guarded by sea snakes.