This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

Decades before the scandal, this staircase on the river was a literal "water gate."

The United States Capitol's former columns still stand.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

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

Hear the quietest sound from across the dome.

Edinburgh's oldest statue hides within a parking lot behind the city's iconic cathedral.

This alley off Edinburgh's Royal Mile contains remnants of the city's seedier history.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

This tin chapel was built by POW's during World War II and is painted to look like something much more grand.

Legend says this rock was once a chopping block for public executions.

A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

The discovery of this Neolithic settlement, which contained a Stone Age "cathedral," threw archaeologists for a loop.

This early version of the guillotine was used to execute the man responsible for its construction.

Thanks to both terrific preservation and historic vandalism this ancient site is known as the "Heart of Neolithic Orkney."

The 16th-century church has the only stained glass windows that survived the Scottish Reformation intact.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

This Scottish burial tomb once held hundreds of ancient eagle bones.

Enter the world under the hill at this ancient UK burial chamber.

The final resting place of soldiers' loyal canine companions.

A red sandstone freestanding monolith rises out of the sea in northern Scotland.

Possibly the oldest of Britain's ancient henges is also one of its most stark.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.