House of the Week: $4.3 million for a modern Lawrence Park mansion with a seriously impressive fish tank

Bragging Rights: The wall-to-wall walnut-lined office, with a ribbon of stainless steel embedded throughout, makes for a pretty impressive place to hold meetings—or at least, reply to emails.

Big Selling Point: There are so many to choose from: is it the 350-gallon fish tank that straddles the living and dining areas? The Chihuly-esque sculpture above the staircase? The wine cellar? The dry sauna in the basement? The outdoor pool with waterfall? Or maybe just the eight-seat theatre room?

Possible Deal Breaker: This is a whole lot of house. Even just filling up the 18-by-11-foot walk-in closet would be more than the average buyer could handle.

By the Numbers:

• $4,298,000 • 5 bedrooms • 8 bathrooms • 350-gallon fish tank • 1 wet sauna • 1 dry sauna • 1 theatre room • 1 outdoor pool • 1 wine cellar