This legendary urban waterfall creates a dazzling display of rainbows.

A marine aquarium with an astounding variety of fish hides in the basement beneath the famous Palm House.

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

The ruins of a medieval monastery named after a type of tree.

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

This impressive working clock made of 16,000 plants changes its flowers twice a year.

These docile dragons are ideal inhabitants for the conservatory greenhouses.

These whimsical works of art tell the story of the city's past and present.

One of the few remaining examples of 19th-century London’s attempt to clean up its reputation.

Hidden behind West Philadelphia rowhomes is a haven for migratory and local bird species both ordinary and rare.

An architectural oddity hides in plain sight on this iconic London bridge.

The world-record holder for the longest bridge stretching continuously over water.

All that remains of the once-booming chain is a single orange-roofed restaurant.

Colorful clay cliffs tower over an unofficial nudist beach on Martha's Vineyard.

This intriguing Bronze Age artifact spent centuries hidden within a Welsh faerie hill.

A gruesome and mysterious ancient sculpture of a pagan deity from the Roman occupation of Celtic Britain.

This demon atop the Notre-Dame de Paris looks utterly bored.

This candy-colored storybook village originated as a 19th-century Methodist campground.

Hidden in the courtyard of the Victoria and Albert Museum is a little-known tribute to two celebrity pooches.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

The bones of two medieval royal lions were discovered at the historic fortress.

The palatial McDonald's that inspired Wesley Willis.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.