This brick-lined pedestrian walkway was once a railway tunnel used during the Civil War.

The narrowest house in America is seven feet of pure spite.

This grave marks the passing of a historic Jane Doe whose identity remains a mystery to this day.

The museum within the Kom-Ombo Temple complex houses mummified crocodiles and mummified crocodile eggs.

Ozymandias’ time-keeping temple.

This unassuming tree stump reportedly traces its roots to the famous pharaoh queen's reign.

Standing atop 2nd-century Roman ruins, this church is one of the oldest and most iconic in Old Cairo.

A subterranean necropolis blending Egyptian, Hellenic, and Roman traditions and art styles.

Underneath the Serapeum ruins lies a dark passage with nooks for books, the lesser-known “sister” to the famous ancient library.

The lost library of Alexandria, revived as a spearhead of cultural preservation.

This fortress was built using the last surviving stones from the Lighthouse of Alexandria, one of the Seven Wonders of the Ancient World.

The largest known Ancient Egyptian obelisk.

With a design inspired by traditional Latvian textiles, this monument honors the Latvian people who suffered under Soviet occupation.

This celebration of Latvia’s freedom and independence avoided demolition over half a century of Soviet occupation.

This enigmatic artifact remained buried in a churchyard for years.

A black cat protests the City Guild in Riga's Old Town.

Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.

This striking memorial is one of Estonia’s most controversial Soviet leftovers.

A unique sculpture calls the outside of this steakhouse home.

"There's nothing there," and other lies the KGB told us.

Only a fragment of this 15th-century Dance of Death survives today.

One of the most spectacular canyons in the world.

Founded as a refugee camp, now a popular tourist spot.

Morocco's Argania trees are infested with nut-hungry goats.