Rebuilt remains of a temple to Roman god Mithras.

A student driver's nightmare.

One part local history, 99 parts gruesome haunted house.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

The sign at the garden gate reads: "These Plants Can Kill."

A tongue-in-cheek arcade where the games are based on everyday life.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

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

This home of a taxidermy hoarder is among the grandest and most singular of historic English estates.

One of Serbia's oldest luxury hotels and a nostalgic echo to Yugoslavia in the state's former capital.

This feat of Brutalist architecture is also known as the Three Sisters.

This ice cream parlor serves scoops of flavors like rakia, medlar, and poppy seed.

Tucked in an urban forest, this restaurant specializes in homemade, healing rakijas.

A spooky juxtaposition of caves and graves gives this legend-filled cemetery a particularly haunting vibe.

The oldest inn in England served brew to the crusaders.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

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

This antique clock once gave the most accurate time in the area.

A living descendant of the famous tree that helped Isaac Newton develop the theory of gravity.

The Lund University's former gym houses a museum focusing on the creative process of art.

This Greek Orthodox church houses the mummified body of St. Spyridon.

A Buddhist temple covered in intricate designs and carvings made out of seashells and pieces of coral.

Once a prosperous mining village, this tiny Taiwanese town is now overrun with cute cats.