Hamburgers are intensely proud of their tunnel beneath the river.

Remnants of an exploded schooner and wrecked submarines form a breakwater.

The remains of the oldest synagogue in Britain lay forgotten for seven centuries, hidden under a humble shop.

A mysterious bridge over a sunken Roman road.

One of Edinburgh's oldest pubs hides a 19th-century skittles alley in the back.

The U.K.'s first underground railway line is now a lively thoroughfare for runners and cyclists.

The remains of a Dominican friary, once one of the largest of its kind in the United Kingdom.

This enormous secondhand bookstore inside a Victorian train station sparked the "Keep Calm and Carry On" craze.

This giant wooden treehouse within a sprawling garden has its own eatery.

This restaurant was removed from the famed sister ship of the Titanic and placed within a hotel.

This tribute to Sunderland's mining past stands outside the home of its football club.

This lonely bronze walrus celebrates a character in a Lewis Carroll poem.

Public art now takes pride of place on the site of one of County Durham's last deep coal mines.

A vortex fountain that seems to rise out of the ground.

Drink your espresso at a Victorian-era urinal in this underground-restroom-turned-coffee-bar.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

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

This historic pub has maintained much of its 1906 decor, including a small sequestered room for women, where orders were slipped through a tiny window.

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

Tucked away near more famous landmarks lies a statue meant to symbolize the confluence and continuing development of human culture.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

This volcanic cave lake is essentially hard proof that Iceland is the most magical place on Earth.

Travel deep inside of Europe's second largest glacier in the world's largest man-made ice cave.