Can you guess which oldest cast-iron building in Mumbai is this? Clue 1: It is located in south Mumbai. Clue 2: It was constructed on site between 1860 and 1863. Still no?

It is the Watson's Hotel, now known as the Esplanade Mansion

John Watson opened the hotel as an exclusive whites-only hotel, and it one of the most renowned hotels in the city in those days.

Located in the Kala Ghoda area of Mumbai, it was named after its original owner, John Watson. The hotel was leased on August 26, 1867 for the terms of 999 years at yearly rent of Rupees 92 and 12 annas to Abdul Haq.

It was closed in the 1960s and was later subdivided and partitioned into smaller cubicles that were let out on rent as homes and offices. The building has been neglected resulting in decay and, despite its listing as a Grade II–A heritage structure, the building is now in a dilapidated state.