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

Outlaws, hot springs, and tragedy have all left their mark on this ancient road in the Icelandic highlands.

A sulfuric martian landscape that looks far better than it smells.

Climb right into the heart of this colorful Iceland volcano.

Home to a vast and influential collection of Shakespeareana.

This historic hotel invented the chocolate brownie.

Legend says if this neo-Gothic basilica is ever officially completed, the world will come to an end.

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

A small town Romanian cemetery filled with darkly humorous gravestones.

A small mountain at the crossroads of Turkey, Iraq, and Syria that some believe was the landing point of Noah's Ark.

An obsolete, vanishing traffic device warns Cincinnati drivers away from middle-of-the-road obstructions.

An abandoned relic of the city's failed experiment with below ground transit.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

An Orwellian sculpture with eyeball cameras watches passersby.

An abandoned 19th-century iron factory perched along the outskirts of an idyllic village.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

Two stone columns flank the grand Venice square, but there were supposed to be three.

An extensive collection of reliquaries containing the bones of saints housed in the largest Catholic church in Venice.

Go inside to really appreciate this 500-year-old technological masterpiece.

The oldest continuously inhabited street in America.

A once grand hotel is being retaken by the wilderness it once capitalized on.

"A hideous albatross in the Hudson River Valley."

A living antique aviation museum in the historic town of Red Hook, New York.