Museum deep in the catacombs of St. Michael the Archangel Church is explored by touch, sound, and smell.

This house's itty bitty size means no humans allowed.

The ruined doorway is a portal to the building's turbulent and torturous past.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

This ancient hydrological marvel is now the base of a modern outdoor cinema.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

Down this yellow brick road, visitors are treated to toadstool houses and massive mushroom sculptures.

A legend says that if this elaborately decorated glass breaks, the good fortune of its owner's household will also disappear.

At almost 1,000 years old, this is the oldest known door in all of Britain.

Soon after its unveiling, this giant inverted globe sparked controversy and was vandalized.

These marks in Myddelton Passage aren't your run-of-the-mill vandalism, and they weren't made by your typical vandal.

This magnificently macabre shield shows the power of chivalrous love in medieval times.

A lasting remnant of The Blitz.

A mysterious carving from 17th-century London seemingly depicts a young boy sitting on a bread basket.

The beloved beast's taxidermy remains sit in the Natural History Museum's cafe.

Only a few pieces remain of the structure that carried people and goods across the Thames for some 600 years.

A network of bells in the pubs and restaurants around Westminster alerts politicians when it's time to cast their votes.

The bones of two medieval royal lions were discovered at the historic fortress.

A museum that chronicles the interesting and often dark history of the London docklands, once one of the major trading ports of the world.

A gruesome and mysterious ancient sculpture of a pagan deity from the Roman occupation of Celtic Britain.

The ruins of a church destroyed by both the Great Fire of London and the Blitz, now turned into a peaceful garden.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

The pockmarks across the building's facade are remnants of the Blitz.

Legend has it that seven Anglo-Saxon kings were coronated on this stone, located in the appropriately-named town of Kingston.