19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

This museum inside a museum tells the story of London's timepieces.

Charles Babbage's proto-computer, painstakingly brought to life.

A clock designed to run with perfect accuracy for 10,000 years.

This innovative steam machine was no doubt the most famous of the pioneer locomotives.

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

Eighty million natural history specimens call this gargantuan museum home.

This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

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

One of Europe's oldest libraries.

Stare out over the lagoon and beyond from this 10th-century campanile on the island where the city of Venice began.

The small peaceful island off the Venice tourist circuit is where the city began more than 1,500 years ago.

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

As can be expected from a centuries-old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

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

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

Local legend says Isaac Newton built this footbridge without any screws, bolts, or nails.

Numberless clock creates a meal of time for the dreaded, insectile Chronophage.

A treasure trove of astronomical, mathematical, and scientific instruments at Cambridge University.

The Cambridge pub where Francis Crick announced that he and James Watson had discovered the DNA double-helix.

A collection documenting Nazi occupation of Norway, including a painting believed to be made by Hitler.

The commemorative stone column conceals a secret laboratory.

An architectural oddity hides in plain sight on this iconic London bridge.