This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

The former textile factory is now an oasis for the arts.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Many people don't realize there’s a lot going on in—and below—the world’s tallest triumphal arch.

Hotel designed around a 16th century Mexican bullring.

A jewel of the Mexico city skyline now slowly crumbles after surviving an earthquake.

At least seven hues of blue and turquoise make this freshwater lagoon unique.

A Lovecraftian altar of nightmarish bronze chairs sits ominously on a boardwalk in Puerto Vallarta.

The ruins of an ancient city built by Mayan traders is centered around a temple of a sacred feathered serpent deity.

Stained glass windows bathe this botanical garden in cosmic light.

At a museum of everyday objects, it is the act of collecting that is really on display.

The enigmatic and seldom visited ruins of a Mayan city-state.

If you can look past the nearby sewer pipes, this urban sinkhole grotto is a mini-paradise.

A museum in the former home of Marxist revolutionary Leon Trotsky.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

Two waterfalls flow down the cliff faces decorated with rare natural basalt columns.

This beautifully deceptive waterfall is something far different from what it appears to be.

The splendor of this 17th century golden chapel has led it to be called the "eighth wonder of the world."

The ruins of an ancient Mayan city, beautifully preserved and only accessible by boat.

The only castle in North America to ever house European sovereigns.

Visiting this cacophonous collection of vintage novelties is like stepping into the mind of a crazed toymaker.

Mexico's astounding mummy museum with "the world's smallest mummy."

The winter home of millions of migrating monarch butterflies.

Diego Rivera's massive tiled fountain and failed infrastructure project.