This complex of vertically-excavated Buddhist, Jain, and Hindu monolithic temples in India's Maharashtra providence illustrates a spirit of tolerance characteristic of ancient India.

World's most expensive home.

Described by William Wordsworth as a "World of Wonder."

Largest lake in Great Britain measured by surface area.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

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

England's most notorious suicide spot.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

The second-highest train station in Europe.

Caves famous for the dragon-slaying saint who lived there.

Traversing steep Alpine slopes, this engineering marvel is one of the longest and highest funiculars in the world.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

These fantastically named natural pools look like something out of a Scottish myth.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

An unexpected ghost village lurks on the southeast coast of Tenerife.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

Its collection includes a broad array of social, geographic, graphic design, and political history.

The commemorative stone column conceals a secret laboratory.

This beautiful deer park was built so King Charles I and his court could go hunting while escaping a deadly plague outbreak.

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

The sumptuous ceiling was one of the last things Charles I saw before his execution.