At night, bats patrol this magnificent 18th-century space in search of book-eating pests.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

This charming candle shop has been in business since 1789.

The world's oldest bookshop still in operation.

The sculpture of the deceased cockatoo flops atop its personal plinth.

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

Remnants of a Victorian garden feature sitting in public woodland.

England's most notorious suicide spot.

These stark white cliffs were spat up by the sea and are slowly being retaken by it.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

The largest of London's subterranean rivers and once a mad, bad center of London life.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

Once one of the largest rooms full of books in the world, this bookstore basement is still a treat for bibliophiles.

The spot where three Protestant clergymen were burned at the stake during the reign of "Bloody Mary."

The names Lúthien and Beren can be found inscribed on the shared grave of the famous writer and his beloved wife and muse.

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

The rotting skeleton of a shoreside fun fair that was destroyed by fire and storms still haunts the Brighton ocean view.

Regency-era excess on the English Coast.

Bridge that died in war and was resurected.

Oriental bazaar in the heart of Sarajevo.

A war-torn Olympic relic is being overtaken by graffiti and nature.