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

Legend has it that this stone moves down to the river sometimes to have a drink.

The site of an early Arthurian battle and the dwelling-place of prehistoric people and (possibly) an ancient race of giants.

Asthmatic Charles Hyett's son built a fantastical garden for his father to convalesce in, alas it was too late.

This stretch of the River Severn where large waves flow against the current is the birthplace of river surfing.

This lucky bronze frog was gifted to Madrid by a casino.

Pilgrims each carried a brick to the top of Mount Monserrate to help build this historic sanctuary in Colombia.

This tiny shop has been serving traditional tamales for more than 200 years.

This narrow street is packed with street vendors and bars selling chicha.

An unusual and beautiful form of mass transit serves the city's steepest neighborhoods.

Three hundred illuminated pillars form an “artificial forest” in Medellín.

This city park wants you to take your shoes off.

The (usually) serene burial place of the world's most notorious drug lord.

Outdoor escalators and art have helped change what was once a notoriously dangerous part of Medellín.

Colombia's biggest botanical garden contains plants from all across the country.

The caldera of this mini-volcano has been turned into a naturally heated mud bath.

A self-proclaimed libertarian micro-state on a tiny bit of disputed territory between Serbia and Croatia.

This trio of neolithic stone monuments are fabled to be a king and his knights that were petrified by a witch.

A fantastic castle rumored to be the birthplace of King Arthur.

65 million-year-old chalk outcroppings mark the end of the Jurassic Coast.

Grotto replete with mystical designs laid out in glued shell mosaics.

The elegant structure of this 19th century railroad bridge creates an illusion of infinity.

A hidden sculpture garden tucked within the middle of Brighton.

Besieged by war, this castle ruin has crumbled into a peaceful picnic spot.