No one knows why this round stone structure was built on a hilltop in Wales.

Legends say that this small island was the final resting place of the Welsh saint of lovers.

One fisherman has used his love of pebbles and shore to create a crazy garden of rocky art.

This monumental gateway marks the northern edge of Brighton and is a welcome sign to all visitors to the seaside city.

This WWII aircraft museum presents its wrecks like taxidermy, complete with recreations of the crash sites.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

This hilarious English intersection is an automotive whirlpool.

This memorial to the thousands of Indian dead during WWI was callously used for target practice during WWII.

These seaside shelters once enjoyed by royalty remain a part of local history.

An unassuming churchyard is the resting place of a pioneering surveyor and reluctant namesake of a mountain.

Regency-era excess on the English Coast.

This tiny alleyway is now a shrine to a subculture riot between the mods and rockers.

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

Tucked between a side street and a theater, this arch once led to a prestigious riding school, and now opens to a courtyard and community garden.

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

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

Seven dragon statues—including one that breathes real fire—are scattered throughout the streets of Krakow.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

Museum deep in the catacombs of St. Michael the Archangel Church is explored by touch, sound, and smell.

The longest and tallest aqueduct in Britain can actually be sailed across.

The quiet field that inspired one of the most famous songs of all time.

The Liverpool street made famous by the Beatles is real.

The tower was originally used as a chimney for the waste incinerator of St Johns Precinct and Market.