A well preserved remnant of the English Civil War.

This 600-year-old tower was built as a comfy residence for cherished pigeons.

One of the earliest large-scale "hyper" roofs in the U.K. is now a derelict roadside attraction.

English Protestants once criticized this enormous private chapel for being too ornate.

Shiny Brutalist box commemorates a pioneer of electricity and houses a railway transformer.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

Remnants of a Victorian garden feature sitting in public woodland.

This stone spire holds a unique place in the region's history.

Abstract dinosaur models in London.

A sculpture of a famous ape who was once a beloved household name in London.

The remains of Crystal Palace Great Exhibition of 1851.

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.

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

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.

Rebuilt remains of a temple to Roman god Mithras.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

This Viking gravestone carved in a rare runic style was dug up from a London churchyard.

It's a mystery why these remains were found with no traces of their bodies in sight.

One of the figures in this Celtic sculpture continues to puzzle archaeologists.

The gigantic skull of a long-extinct species that once roamed the forests of England and Ireland.

What might be the oldest living tree in London has survived fires, bombings, and estate agents.

This Underground station has been a popular filming location for decades, even before it closed.

Dictionary Johnson’s favorite feline.