Location: Boston, Massachusetts

Price: $14,950,000

From the street, this townhouse looks like many others in this staid section of Beacon Hill: delicate wrought iron and an elegant entryway. Inside, the old-world feel continues on the parlor floor, with finely preserved moldings and fireplaces. It's up on the roof that things get unorthodox. Up on the secluded roofdeck, a heated infinity lap pool provides a pleasant place for a dip, especially with the spectacular views of the leafy greens of Boston Common and the Public Garden. Another sort of green will be required to enjoy this Beantown beauty, $14,950,000, but for that the buyer gets the best of both the old and new, not to mention 8,450 square feet in Boston's finest neighborhood.

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