Singapore's oldest Hindu temple.

A sculptor's dream castle turned fantastical ruin.

This fallen red oak tree has been transformed into a piece of trailside art.

Between 1930 and 1946, a tobacco farmer laid his beloved horses and mules to rest in this small patch of pine forest.

Don't be surprised if you see a long-necked dinosaur peeking out from among the trees in Northgate Park.

The humble horn finally finds a place in the sun.

New York's oldest concrete structure is being preserved thanks to the gentrification of Whole Foods.

This unique house, the only one of its kind in Brooklyn, was built as part of a real estate developer's showcase.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

A fortified medieval basilica on the Caelian Hill preserves extraordinary frescoes and one of Rome's most beautiful hidden cloisters.

A rather vulgar example of the transition from Latin to the Italian vernacular.

A Nesting Doll of Churches.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

Remnants of a 4th-century church with vivid medieval frescoes and ancient sarcophagi hide beneath this old basilica.

The best preserved Paleochristian basilica in Rome hides a number of oddities and secrets.

The underground sanctuary of a mysterious ancient cult.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

An alchemist's "magic door" stands in the middle of a Roman park.

Architectureal fantasy quarter of Rome.

Charles Dickens was not a fan of the ghastly wall dressings in this 6th century church.

This medieval church in Rome was almost destroyed following a terrorist attack in 1993.