This tree was grafted from the actual tree that led Isaac Newton to ponder the theory of gravity.

This quaint mortuary chapel hides a stunning Celtic Revival and Art Nouveau interior.

The world’s oldest surviving single-arch railway bridge.

Locals call it the "Give Peas a Chance" bridge because of its distinct graffiti.

A remarkable feat of Victorian engineering across the Firth of Forth.

The heads of two giant mythological water horses honor Scotland's horselord past.

Many of Edinburgh's more unsavory characters spent their final days behind this door while awaiting their executions.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

The most loyal of little dogs, or a Victorian era publicity stunt?

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

Accessible only at low tide, the deserted island is dotted with World War II ruins.

A poignant memorial shows the widows and children left heartbroken by the worst fishing disaster in Scottish history.

Twice a day this ancient path disappears with the tides, leaving the Holy Island of Lindisfarne out to sea.

The sign at the garden gate reads: “These Plants Can Kill.”

These steps offer a breathtaking view of one of Europe's most besieged fortresses.

A two-way chairlift system between Zugliget and the highest point in the city.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

One of the largest wooden constructions in Europe was meant to be a casino, but soon became an orphanage.

This sculpture combines the literary Alice with her real-life inspiration.

A little slice of Japan and its aesthetics in London's Holland Park.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

A 1950s beatnik coffee house, turned 60s counterculture hotspot, turned modern music venue.

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

The world's first purpose-built motor racetrack was destroyed by the outbreak of two world wars.