This monument is dedicated to a young boy who survived a disaster that forced Edinburgh to reevaluate its building codes.

The Scottish Reformation leader's grave was paved over and is now a parking lot.

This small museum in a 17th-century building honors three iconic Scottish writers.

Brass bricks outline the locations of Edinburgh's lost, lively market stalls.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

This coffee shop lies hidden beneath a historic church.

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

The last four extravagant street signs of London's historic banking street.

The site of London’s first coffee house has been serving refreshments of one kind or another for 360 years.

These Victorian era devil sculptures were designed to spite a local vicar.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

Scattered throughout London are ancient remnants of the city's former bounding wall.

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

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

The Great Fire of London and the regulation of one-way streets both started in this alley.

The commemorative stone column conceals a secret laboratory.

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

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.